Test Bank for Biochemistry 9th Edition Campbell, Farrell

TEST BANK FOR BIOCHEMISTRY, 9TH EDITION, MARY K. CAMPBELL, SHAWN O. FARRELL, OWEN M. MCDOUGAL Chapter 01 - Biochemistry and the Organization of Cells 1. How do the molecules that play a role in living cells compare to those encountered in organic chemistry? a. They are the same, just operating in a different context. b. Biological molecules are organic molecules, but the similarity ends there. c. Biological molecules aren't similar to organic molecules at all. d. Biology isn't based on molecules at all, but a "vital force". ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6e TOPICS: Basic Themes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 2. Which of the following shows the correct order from most simple to most complex: a. atom, molecule, organelle, macromolecule b. molecule, atom, macromolecule, organelle c. tissue, cell, organ d. atom, macromolecule, tissue, organ ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.2 - Added in 8e TOPICS: Basic Themes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 11/16/2016 1:13 AM 3. Which of the following best defines organic chemistry? a. The study of compounds contained in organisms. b. The study of compounds containing organs. c. The study of compounds containing carbon and hydrogen and their derivatives. d. The study of compounds containing elements other than carbon. ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6e TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 4. Which of the following is NOT one of the primary simple molecules that scientists believe must have ultimately led to creating living things? a. ammonia b. carbon dioxide c. hydrogen d. simple carbohydrates ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.3 - New in 8e TOPICS: Basic Themes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 11/16/2016 12:07 AM 5. Which of the following was part of the vital force theory? a. The compounds found in living things are just like those found in the non-living world. b. The compounds found in living things are interesting, but can easily be produced in the laboratory. c. The compounds found in living things can not be produced in the laboratory. ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6e TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 6. The synthesis of urea from ammonium cyanate. a. was a critical component of the Miller-Urey experiment. b. requires a protein as a catalyst. c. helped dispel the vital force theory. d. supported the vital force theory. ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 7. Which of the following is NOT a Functional Group a. Amino group b. Protein c. Alcohol group d. Carbonyl group ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7e TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 8. Which of the following functional groups is specific to an alcohol? a. -NH b. -OH c. -C=O d. C=C e. O-P ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.3 - New in 8e TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 11/23/2016 12:42 AM 9. Which of the following functional groups are not commonly seen in biomolecules? a. Alkyl halides b. Amides c. Carboxylic acids d. Ethers e. Phosphate esters ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 10. Which of the following statements regarding biomolecules is false? a. They contain predominantly ionic bonds. b. They contain predominantly nonmetallic elements. c. Carbon is the key element. d. Specific stereoisomers are essential in most cases. ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 11. All of the following bonds are important in biomolecules, except: a. C−Cl b. C−H c. C−N d. O−H e. O−P ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 12. Which of the following statements regarding biopolymers is false? a. Different sequences of the monomers can lead to different functions. b. Only soluble polymers can be created from soluble monomers. c. A wide, almost uncountable variety of polymers can be created from just a few monomers. d. Different linkages between the monomers can lead to different functions. e. Biopolymers can fold up into complex shapes. ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 13. Which statement is not correct about peptide nucleic acids, PNA? a. They are combinations of peptides and nucleic acids. b. Scientists create them to study the origins of life c. They were proven to be the first hereditary molecule. d. They may combine the catalytic properties of proteins with the information transfer ability of nucleic acid e. All of these statements apply to PNA. ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7e TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 14. According to the big bang theory of the creation of the universe, a. the universe has been getting cooler since its beginning b. the initial explosion caused the creation of all of the elements of the periodic table c. carbon is the most abundant element in the universe d. the earth could be no older than 1 billion years ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7e TOPICS: Origin of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 15. In its earliest stages, which atoms were present in the universe? a. carbon, hydrogen, and oxygen b. hydrogen, helium, and lithium c. nitrogen, sulfur, and phosphorous d. uranium, polonium, and radium e. helium, neon, and argon ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6e TOPICS: Origin of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 16. How are the majority of elements thought to have been formed? a. By thermonuclear reactions that normally take place in stars. b. In explosions of stars. c. By the action of cosmic rays outside the stars since the formation of the galaxy. d. All of the choices are true e. None of the choices; all the elements were present from the initial Big Bang. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6e TOPICS: Origin of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 17. What is the chemical formula for ozone? a. O 2 b. O 3 c. NH 3 d. H 2 S e. CH 4 ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6e TOPICS: Origin of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 18. It is generally believed that the following gas was missing in the primordial atmosphere: a. H 2 b. CO 2 c. CH 4 d. NH 3 e. O 2 ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Origin of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 19. A catalyst a. increases the rate of a chemical reaction b. increases the amount of product obtained in a chemical reaction c. decreases the amount of product obtained in a chemical reaction d. none of the choices ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Origin of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 20. The genetic coding material is a. protein b. DNA c. polysaccharide d. lipid ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Origin of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 21. The presence of two anhydride linkages is an important feature of a. ATP b. proteins c. glucose d. carbon monoxide ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.3 - New in 8e TOPICS: Origins of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 11/16/2016 1:16 AM 22. Which of the following best describes the results of the Miller-Urey experiment? a. It proved that DNA is the genetic material. b. It produced proteins under conditions simulating the early Earth. c. It created living cells from non-living materials. d. It produced some simple organic compounds from a mixture of gases presumed to have existed in the early atmosphere. e. All of these results of the Miller-Urey experiment. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6e TOPICS: Origin of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 23. The idea that a coding system and a catalysis system came about separately and then combined to form life as we know it is known as a. the origin of life b. the big bang theory c. the double origen theory d. the theory of evolution ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.3 - New in 8e TOPICS: Origens of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 11/16/2016 1:16 AM 24. The genetic code a. determines the order of sugars in a polysaccharide b. has no effect on the sequence of amino acids in proteins c. is the means by which the "blueprint" for living organisms is passed from one generation to the next d. cannot be understood by currently available experimental methods ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Origin of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 25. Biological catalysts are a. proteins exclusively b. RNA exclusively c. DNA exclusively d. some proteins and some RNA ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Origin of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 26. The main difference between prokaryotic and eukaryotic cells is the existence of _____ in eukaryotes. a. the nucleus b. ribosomes c. DNA d. RNA e. cell walls ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Prokaryotes & Eukaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 11/29/2016 6:44 AM 27. All of the following features are common to all living organisms, except: a. Biomolecules b. Metabolic pathways c. Cellular structures d. DNA sequences e. RNA molecules ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Prokaryotes & Eukaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 28. All eukaryotic organisms a. are multicellular b. have a nucleus c. have chloroplasts d. have a cell wall ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7e TOPICS: Prokaryotes & Eukaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 29. Cell membranes a. are found in plants, but not in animals b. consist mainly of sugars c. do not allow transport into or out of the cell d. separate the cell from the outside world ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Prokaryotes & Eukaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 30. Which of the following is not a subcellular organelle? a. nucleus b. mitochondrion c. endoplasmic reticulum d. cytoskeleton ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7e TOPICS: Prokaryotes & Eukaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 31. Energy-yielding oxidation reactions take place in eukaryotic a. nuclei. b. ribosomes. c. mitochondria. d. endoplasmic reticula. e. cell walls. ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6e TOPICS: Prokaryotes & Eukaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 32. Prokaryotic cells a. do not have a well defined nucleus b. are smaller than eukaryotic cells c. do not have internal membranes d. all of the above ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Prokaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 33. Prokaryotes a. contain ribosomes b. do not have a cell membrane c. contain mitochondria d. none of the above ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Prokaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 34. Ribosomes a. are the site of photosynthesis b. are the site of protein synthesis c. are never bound to membranes d. cannot be seen in the electron microscope ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Prokaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 35. 11 Ribosomes are made up of a. RNA and proteins b. DNA and proteins c. RNA and DNA d. proteins and carbohydrates ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Prokaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 36. Which of the following cellular components is commonly found in bacteria? a. Nucleus b. Ribosomes c. Chloroplasts d. Mitochondria e. More than one of these is characteristic of bacteria. ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Prokaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 37. Which organelle does not contain DNA? a. Nucleus b. Mitochondrion c. Rough Endoplasmic Reticulum d. Chloroplast e. All of these organelles contain DNA ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 38. Which cell component is composed of RNA and protein? a. Nucleus b. Mitochondrion c. Endoplasmic Reticulum d. Chloroplast e. Ribosome ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6e TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 39. Which cell component has cristae? a. Nucleus b. Mitochondrion c. Endoplasmic Reticulum d. Chloroplast e. Ribosome ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6e TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 40. Which organelle is involved in the synthesis of ATP? a. Nucleus b. Mitochondrion c. Chloroplast d. ATP is synthesized in both mitochondria and chloroplasts. e. ATP is synthesized in all three organelles. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 41. Eukaryotic DNA a. is found in the nucleus b. is found in the mitochondrion c. is found in the chloroplast d. all of the above ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 42. Which of the following statements about eukaryotic nuclei is FALSE? a. They are separated from the rest of the cell by a single membrane. b. They contain RNA. c. They contain chromatin. d. They play a role in genetics. ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 43. Which cell component does not have a double membrane? a. Nucleus b. Lysosome c. Rough Endoplasmic Reticulum d. Chloroplast e. Mitochondrion ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 44. Which of the following statements about eukaryotic mitochondria is TRUE? a. They play a role in genetics. b. They are the site of photosynthesis in green plants. c. They have an inner and an outer membrane. d. They only occur in animals, not plants. ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 45. Which is not a property of ribosomes? a. They are an assembly of polypeptides and RNA. b. They are found in both prokaryotic and eukaryotic cells. c. They function as agents in the biosynthesis of proteins. d. They are found in the cytoplasm and smooth endoplasmic reticulum. e. All of these statements are true about ribosomes. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 46. Which cell component is able to capture the energy of light? a. Nucleus b. Lysosome c. Rough Endoplasmic Reticulum d. Chloroplast e. Mitochondrion ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 47. Which cell component contains many hydrolytic enzymes? a. Nucleus b. Lysosome c. Rough Endoplasmic Reticulum d. Chloroplast e. Mitochondrion ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 48. The following cellular component is characteristic of eukaryotic cells: a. Nucleus b. Ribosomes c. Chloroplasts d. Mitochondria e. More than one of these is characteristic of eukaryotic cells. ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 49. The following cellular component is the defining component of eukaryotic cells: a. Nucleus b. Ribosomes c. Chloroplasts d. Mitochondria e. Cell membranes ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 50. The mitochondrial matrix a. is the location of enzymes needed for oxidation reactions b. contains an array of microtubules c. is part of the endoplasmic reticulum d. lies between the inner and outer mitochondrial membrane ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 51. The following cellular component is the defining component of most plant cells: a. Nucleus b. Ribosomes c. Chloroplasts d. Mitochondria e. Cell walls ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 52. The endoplasmic reticulum a. is part of a continuous membrane system throughout the cell b. occurs in two forms, rough and smooth c. can have ribosomes bound to it d. all of the above ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 53. Chloroplasts a. contain no DNA b. are bounded by a single membrane c. are relatively small organelles d. are the site of photosynthesis in green plants ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 54. The Golgi apparatus a. occurs in prokaryotes b. is involved in secretion of proteins from the cell c. is part of the chloroplast d. is the site of protein synthesis ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 55. Lysosomes, peroxisomes, and glyoxysomes are a. sites of cell damage b. important in mitosis c. specialized organelles d. a part of the rough endoplasmic reticulum ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 56. Cell walls a. occur in plants and bacteria b. occur in plants and animals c. occur only in plants d. occur only in bacteria ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 57. Animal cells do not contain a. a nucleus b. mitochondria c. chloroplasts d. lysosomes ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 58. A kind of cellular structure present in plant cells but not in human cells is a. the endoplasmic reticulum b. a cell wall c. ribosomes d. a plasma membrane ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 59. Which of the following organelles does not have a double membrane? a. mitochondrion b. nucleus c. endoplasmic reticulum d. chloroplast ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: Eukaryotic Structure DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 60. Which of these kingdoms includes only prokaryotic organisms? a. Animals b. Fungi c. Monera d. Plants e. Protista ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: How we classify eukaryotes and prokaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 61. Which of these eukaryotic kingdoms consists primarily of unicellular organisms? a. Animals b. Fungi c. Plants d. Protista e. Both fungi and protista. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: How we classify eukaryotes and prokaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 62. In the Five Kingdom classification system, human beings would be considered a. animals. b. protists. c. monera. d. fungi. e. none of the above. ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: How we classify eukaryotes and prokaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 63. In the Five Kingdom classification system, Escherichia coli would be considered a. animals. b. protists. c. monera. d. none of the above. ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5e TOPICS: How we classify eukaryotes and prokaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 64. The endosymbiotic theory describes the origin of a. the nucleus & ribosomes. b. the Golgi and endoplasmic reticulum. c. lysosomes and the cytoskeleton. d. mitochondria & chloroplasts. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: How we classify eukaryotes and prokaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 65. Which of following provides evidence for the endosymbiotic theory describing the origin of mitochondria & chloroplasts? a. These organelles have their own nuclei. b. These organelles have their own endoplasmic reticulum. c. These organelles have their own lysosomes. d. These organelles have their own DNA. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6e TOPICS: How we classify eukaryotes and prokaryotes DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 66. According to thermodynamics, favored processes are a. ones that require energy. b. ones that release energy. c. oxidations. d. reductions. ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Biochemical Energetics DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 67. Which of the following is/are true? a. The hydrolysis of ATP releases energy. b. Favorable reactions are always fast. c. The hydrolysis of ATP requires the input of oxygen d. The hydrolysis of ATP yields more energy per molecule than the reaction of any other compound ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7e TOPICS: Biochemical Energetics DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 68. The aerobic combustion of glucose to yield carbon dioxide and water a. is thermodynamically favorable b. requires oxygen c. has a negative Gibb’s free energy d. all of these are true ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7e TOPICS: Energy and Change DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 69. A spontaneous reaction is a. exergonic. b. endergonic. c. at equilibrium. d. none of the above. ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.6 - Modified in 7e TOPICS: Spontaneity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 70. The heat of a reaction at constant pressure is a. its change in entropy. b. its change in enthalpy. c. its change in free energy. d. its spontaneity. ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Life and Thermodynamics DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM Match the macromolecules with the monomeric unit in each. a. nucleic acids b. proteins c. carbohydrate QUESTION TYPE: Matching HAS VARIABLES: False TOPICS: Origin of Life DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 71. amino acid ANSWER: b POINTS: 1 72. monosaccharide ANSWER: c POINTS: 1 73. nucleotide ANSWER: a POINTS: 1 74. Identify the class of basic biomolecules represented by the following structure. a. Carbohydrates b. Amino acids c. Nucleotides d. Lipids ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 11/25/2016 4:56 AM DATE MODIFIED: 11/25/2016 5:00 AM 75. Explain the significance of functional groups in biochemistry. ANSWER: Biomolecules have characteristic functional groups that determine their reactions. Many of these functional groups contain oxygen and nitrogen, which are among the most electronegative elements. As a result, many of these functional groups are polar, and their polar nature plays a crucial role in their reactivity. POINTS: 1 QUESTION TYPE: Essay HAS VARIABLES: False TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 11/25/2016 5:01 AM DATE MODIFIED: 11/25/2016 5:31 AM 76. Which of the following biomolecules forms the molecular currency of the cell, adenosine triphosphate (ATP)? a. Nucleotides b. Esters c. Amino acids d. Lipids ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 11/25/2016 5:23 AM DATE MODIFIED: 11/25/2016 5:30 AM 77. Carbohydrates can be represented by a general formula of _____. a. R-CH n (NH 2 )-COOH b. CH 3 (CH 2 ) n CO 2 H c. C n H 2n-2 d. (CH 2 O) n ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 11/25/2016 5:32 AM DATE MODIFIED: 11/25/2016 5:34 AM 78. Lipids are characterized by poor solubility in water most of their structure is composed of _____. a. a central carbon atom bonded to a carboxyl group, a hydrogen group, and a variable group, called the R group b. a five-carbon sugar, a nitrogen-containing ring, and one or more phosphate groups c. long chains of hydrocarbons d. straight sugar chains that forms cyclic structures in a solution ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Chemical Foundations of Biochemistry DATE CREATED: 11/25/2016 5:36 AM DATE MODIFIED: 12/2/2016 8:51 AM ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6 TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6 TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM Chapter 02 - Water: The Solvent for Biochemical Reactions 1. The tendency for an atom to attract electrons to itself in a chemical bond is called e 2. If atoms with greatly differing electronegativities form a bond, that bond will be a. polar. b. nonpolar. c. amphipathic. d. acidic. e 3. Many of the properties of water can be accounted for by the fact that a. it is polar b. it forms hydrogen bonds a. polarity. b. electronegativity. c. hydrophilicity d. electrophilicity. c. it is a bent molecule d. all of these are true ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7 TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.6 - Modified in 7e TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 4. Which of the following is true about ionic compounds? a. They are more likely to dissolve in non-polar solvents than covalent compounds. b. They always dissolve completely in water. c. They never dissolve in polar solvents. d. Some of them dissolve completely in water or other polar solvents, while others do not. e 5. Which of the following is a correct listing of electronegativity values, from low to high? a. C, H, O, N b. N, H, O, C c. H, C, N, O d. H, C, O, N ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 6. Which of the following elements has the highest electronegativity? a. C b. H c. N d. O e. P ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM e 7. The water molecule is polar because: a. Electrons are not distributed symmetrically in the molecule. b. The hydrogen atoms are found on one "side" of the molecule. c. Hydrogen is less electronegative than oxygen. d. The hydrogen atoms are found on one "side" of the molecule and hydrogen is less electronegative than oxygen. e. All of these are correct. ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 8. Which of the following molecules is polar? a. CCl 4 b. CH 4 c. CO 2 d. NH 3 e. None of these molecules is polar. e 9. Which of the following molecules is amphipathic? a. sodium chloride b. acetic acid c. benzene d. palmitic acid ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7 TOPICS: Water and Polarity e 10. Which of the following classes of compounds is hydrophilic? a. Sugars b. Fatty acids c. Amino acids d. Sugars and amino acids. e. All of these ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 11. Which of the following classes of compounds is hydrophobic? a. Table Salt b. Cholesterol c. Phosphate esters d. Cholesterol and phosphate esters. e. All of these are hydrophobic. ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 12. Which of the following molecules has polar bonds but is itself not polar? a. NH 3 b. CO 2 c. CH 4 d. H 2 O e ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.3 - New in 8 TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.3 - New in 8 TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 13. When a carboxylate side-chain of one amino acid in a protein is in close proximity to a charged amino group of another amino acid, we call the resulting interaction a(n) a. ion - dipole bond b. ionic bond c. van der Waal’s bond d. salt bridge e 14. A London dispersion force is another name for a(n) a. induced dipole - induced dipole bond b. ionic bond c. covalent bond d. non-polar bond e 15. Ionic compounds and polar covalent compounds tend to dissolve in water because of a. ion-dipole and dipole-dipole interactions b. dipole-induced dipole interactions c. van der Waals bonds d. hydrophobic interactions ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 16. Which of the following is not considered a van der Waal’s force? ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.3 - New in 8 TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM a. dipole - dipole bond b. dipole - induced dipole bond c. induced dipole - induced dipole bond d. ion - dipole bond e 17. A micelle is a structure which a. aggregates with other micelles in water. b. has its polar groups on the outside and non-polar groups on the inside when in water. c. explains how soaps and detergents work. d. has its polar groups on the outside and non-polar groups on the inside when in water and explains how soaps and detergents work. e. All of these are true. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.6 - Modified in 7e TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 18. Which of the following compounds is most likely to form a micelle? a. Acetic acid. b. Glucose. c. Glycerol. d. Sodium palmitate. e. Sodium phosphate. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.7 - Modified in 8e TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 19. The substance most likely to form a micelle is ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6 TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM a. acetic acid b. sodium palmitate c. methyl alcohol d. acetone ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 20. Molecules which contain both hydrophilic and hydrophobic regions are: a. Amphipathic b. Amphiphilic c. Able to form micelles d. Both amphipathic and amphiphilic e. All of these ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Water and Polarity DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 21. How do hydrogen bonds tend to affect the melting and boiling points of substances? a. They tend to increase both melting and boiling points. b. They tend to decrease both melting and boiling points. c. They tend to increase melting points and decrease boiling points. d. They tend to decrease melting points and increase boiling points. e. They do not have any affect on either melting or boiling points. e 22. Hydrogen bonds a. play an important role in the solvent properties of water b. are not involved in protein structure c. play a role in the properties of DNA, but not of RNA d. give water a lower boiling point than expected ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 23. Which of the following molecules will not form hydrogen bonds? a. CH 4 b. NH 3 c. H 2 O d. HF ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 24. How does the strength of hydrogen bonds compare with covalent bonds? a. Hydrogen bonds are much stronger than covalent bonds. b. Hydrogen bonds are much weaker than covalent bonds. c. Hydrogen bonds and covalent bonds have similar strengths. d. The question cannot be answered without knowing which covalent bonds are being referred to ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.6 - Modified in 7e TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 25. A hydrogen bond is a special type of a. dioole - dipole bond b. induced dipole - induced dipole bond c. covalent bond d. ionic bond ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.3 - New in 8 TOPICS: Hydrogen bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 11/23/2016 2:21 AM ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7 TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM e 26. Which of the following is true regarding hydrogen bonds. a. They can only form between two different molecules b. They are important in protein folding but not DNA structure c. They are important in DNA structure but not protein folding d. They can be found within a single molecule e 27. In a hydrogen bond a. three atoms lie in a straight line b. there is stronger bonding than in a covalent bond c. unpaired electrons play no role d. none of the above ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 28. The non-covalent interaction below associated with the strongest force in aqueous solution is a. dipole-induced dipole b. hydrophobic interactions c. hydrogen bonding d. van der Waals forces ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 29. Which of the following statements about hydrogen bonds is false? ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM a. The donor is a hydrogen atom bonded to a less electronegative atom then hydrogen. b. The more linear the bond, the stronger the attraction. c. The acceptor must contain a non-bonded pair of electrons. d. It is a type of non-covalent bond. e 30. True hydrogen bonds can NOT form between hydrogen and this element: a. N b. F c. C d. O e. All of these elements can form hydrogen bonds. ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 31. What is the maximum number of hydrogen bonds a single water molecule can form? a. 1 b. 2 c. 3 d. 4 e. 5 e 32. Which of the following characteristics makes for a good hydrogen bond acceptor? a. a high electronegativity b. a nonbonding pair of electrons ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.3 - New in 8 TOPICS: Hydrogen bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM c. both of these d. neither of these ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.6 - Modified in 7e TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 33. Which of the following characteristics makes for a good hydrogen bond donor? a. a high electronegativity b. a nonbonding pair of electrons c. both of the above d. neither of the above e 34. Which of the following properties of water are related to its ability to form hydrogen bonds? a. boiling point b. melting point c. density d. solvent potency e. all of the choices e 35. Hydrogen bonds explain which of the following properties of water? a. Water is a great solvent for all ionic and polar molecules. b. Water has high melting and boiling points for its small size. c. Ice expands when frozen. d. Both the abnormal melting and freezing points and that ice expands when frozen. ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7 TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM e. Hydrogen bonds explain all of these properties. ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 36. Hydrogen bonds can only form when the hydrogen atom is involved in a polar bond. a. True b. False ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 37. Which of the following is a true statement? a. most substances contract when they freeze. b. water expands when it freezes. c. hydrogen bonding is related to water’s tendency to expand as it freezes. d. all of these are true e Exhibit 2A The structure of ATP with various groups labeled. Group III is the entire phosphate group. 38. Refer to Exhibit 2A. Which of the functional groups cannot function as a hydrogen donor to water? a. I b. II c. III d. IV e. All can donate a hydrogen to water. ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False PREFACE NAME: Exhibit 2A TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 39. Refer to Exhibit 2A. Which of the functional groups is the most electrophilic? a. I b. II c. III d. IV e. The answer cannot be determined without further information. ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False PREFACE NAME: Exhibit 2A TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 40. Refer to Exhibit 2A. Which of the groups could not act as a proton acceptor in a hydrogen bond? a. I b. II c. III ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6 TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM H d. IV e. All can accept a hydrogen in a hydrogen bond. ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False PREFACE NAME: Exhibit 2A TOPICS: Hydrogen Bonds DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 41. Is water an acid or a base? a. Water is an acid. b. Water is a base. c. Water is both an acid and a base. d. Water is neither an acid nor a base. e 42. For an acid that undergoes this reaction: HA ↔ + + A− K a = a. + [H ][A−]/[HA] b. + [H ][HA]/[A−] c. [HA][A−]/[ + H ] d. [A−]/[HA][ + H ] e. + [H ]/[HA][A−] e ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6 TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6 TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 43. Which will dissociate most in water, a weak acid or a strong acid? a. A weak acid. b. A strong acid c. They should dissociate about the same. d. It's impossible to predict. e 44. Bases are a. proton donors. b. proton acceptors. c. hydrogen bond donors. d. hydrogen bond acceptors. e 45. Which has the greater K a , a weak acid or a strong acid? a. A weak acid. b. A strong acid c. They should dissociate about the same. d. It's impossible to predict. e 46. Which has the greater pK a , a weak acid or a strong acid? a. A weak acid. b. A strong acid ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6 TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM c. They should dissociate about the same. d. It's impossible to predict. e 47. The dissociation constant for an acid with a pK a value of 6.0 is a. 1 × 10 6 b. −1 × 6 10 c. 1 × 10 6 d. −1 × 10 6 ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 48. A buffer solution at pH 10 has a ratio of [HA]/[A−] of 10. What is the pK a of the acid? a. 8 b. 9 c. 10 d. 11 e. 12 e 6 49. The dissociation constant for an acid is 1 × 10− . What is its pK a ? a. −6 b. 6 c. 0.6 d. −0.6 ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.6 - Modified in 7e TOPICS: Acids, Bases, and pH NOTES: Answer was incorrect in 6e DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 50. The pH of a solution of 0.04 M HCl is: a. 4 b. 1.4 c. 0.4 d. 0.04 e. The pH cannot be determined ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 51. The pOH a solution of 0.04 M HCl is: a. 1.4 b. 10 c. 12.6 d. 13.6 e. The pOH cannot be determined ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 52. An HCl solution has a pH = 3. If you dilute 10 mL of the solution to 1000mL, the final pH will be: a. 1.0 b. 2.0 c. The pH does not change. d. 4.0 e. 5.0 ANSWER: e ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.1 - New in 6 TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM [H ] [H ] POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 53. If a solution has a pH = 9.6, the + is a. 2.5 × 10 10 b. 9.6 M c. 2.5 M d. 2.5 × 10 10 M e. 9.6 × 10 10 M ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 54. What is the pH of a solution with + = 10 mM? a. 10 b. 1 c. 2 d. −2 e 55. Calculate the final pH of a solution made by the addition of 10 mL of a 0.5 M NaOH solution to 500 mL of a 0.4 M HA originally at pH = 5.0 (pKa = 5.0) Neglect the volume change. a. 6.10 b. 5.09 c. 7.00 d. 5.55 ANSWER: d POINTS: 1 QUESTION TYPE: Multiple Choice ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7 TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM a. 10 14 b. 10 7 c. 10 0 d. 10 7 e. 10 1 [H ] HAS VARIABLES: False TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 56. If a solution has a pH = 6, the + is a. 6 M b. 10 6 M c. 10 6 M d. 0.6 M e 57. What is the pH of an acetic acid solution where the concentration of acetic acid is 2 mM and the concentration of sodium acetate is 20 mM. The pK a of acetic acid is 4.76. a. 5.76 b. 10.6 c. 12.6 d. 8.8 e 58. The ion product constant for water (K w ) is equal to: 4 ANSWER: e POINTS: 1 QUESTION TYPE: Multiple Choice ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Titration Curves DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM HAS VARIABLES: False TOPICS: Acids, Bases, and pH DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 59. In a titration of a weak acid by a strong base a. two equivalents of base are always needed to neutralize all the acid present b. the equivalence point cannot be defined exactly c. there is a region in which the pH changes slowly d. the equivalence point depends on the nature of the added base ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Titration Curves DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 60. A solution at pH 7 contains a weak acid, HA. The pK a of the acid is 6.5. What is the ratio of [A−]:[HA]? a. 1:3 b. 1:1 c. 3:1 d. 10:1 ANSWER: c POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Titration Curves DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 61. When does a weak acid buffer best? a. From one pH unit below its pK a to its pK a . b. From its pK a to one pH unit above its pK a . c. Within one pH unit of its pK a , both above and below. d. Weak acids do not make good buffers at all. e ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.4 - New in 7 TOPICS: Titration Curves DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 62. The inflection point of the titration curve for a weak monoprotic acid is equal to its pK a a. True b. False ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Titration Curves NOTES: Answer was incorrect in 6e DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 63. Which of the following is true? a. The pH of a solution where the A− to HA ratio is 1 has a pH = pK a . b. If the pH does not equal the pK a , the solution is not a buffer. c. The best buffer for any experiment will always have a pH equal to the pK a . d. If a buffer has more weak acid than conjugate base, the pH will be higher than the pK a . e + 64. Using the Henderson-Hasselbalch equation, calculate the pH of an ammonia buffer when the NH 3 :NH 4 moles:0.6 moles. (pK = 9.75) ratio is 0.4 a. 7.40 b. 9.07 c. 9.25 d. 9.43 e. 11.05 ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Titration Curves DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM + 65. An ammonia buffer contains NH 3 :NH 4 0.01 moles of HCl to this buffer? a. 8.98 in a ratio of 0.4 moles:0.6 moles (pK = 9.75). What will be the pH if you add Chapter 02 - Water: The Solvent for Biochemical Reactions ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.8 - Modified from 6 TOPICS: Titration Curves DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM b. 9.04 c. 9.25 d. 9.46 e. 9.52 ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Titration Curves DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 66. The ratio of a weak acid and its conjugate base at the point of maximum buffering capacity is a. 1/1 b. 1/10 c. 10/1 d. no definite ratio is needed ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Titration Curves DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 67. Which substance would be the best buffer at pH 8 if it had to be able to buffer against either acid or base? a. one with a pK a of 7 b. one with a pK a of 8 c. one with a pK a of 9 d. The pK a of a substance doesn't tell you whether it would be a good buffer at this pH. e 68. Buffering capacity refers to a. the effectiveness of commercial antacids b. the extent to which a buffer solution can counteract the effect of added acid or base c. the pH of a buffer solution d. the molecular weight of the substance used as a buffer Chapter 02 - Water: The Solvent for Biochemical Reactions ANSWER: a POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: CAFA.BIOC.15.5 - Modified from 5 TOPICS: Titration Curves DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Titration Curves DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 69. If the pH of 1 liter of a 1.0 M carbonate buffer is 7.0, what is the molar ratio of H 2 CO 3 to HCO 3 −? (pK = 6.37) a. 0.234 b. 4.27 c. 6.37 d. 7.00 e. 10.20 ANSWER: b POINTS: 1 QUESTION TYPE: Multiple Choice HAS VARIABLES: False TOPICS: Titration Curves DATE CREATED: 12/23/2013 2:14 PM DATE MODIFIED: 12/23/2013 2:14 PM 70. Consider a reaction that produces a