PORTAGE LEARNING CHEM 210 TEST 1.| 2021 EXAM

This study source was downloaded by from CourseH on 02-14-2022 16:51:25 GMT -06:00 PORTAGE LEARNING CHEM 210 TEST 1.| 2021 EXAM This study source was downloaded by from CourseH on 02-14-2022 16:51:25 GMT -06:00 Test 1 CORRECT ANSWERS ARE IN RED Question 1 True or False: According to the Module, a compound with a molecular mass of 8,000 g/mol is considered a macromolecule. True False Question 2 True or False: Biomolecules can have two or more differentfunctional groups. True False Question 3 True or False: The following functional group is an amide. True False Question 4 True or False: In a eukaryotic cell, the organelles called peroxisomesserve the purpose of digesting macromolecules. True False Question 5 True or False: Carbon dioxide has a linear molecular shape AND has a bond angle of 180o. This study source was downloaded by from CourseH on 02-14-2022 16:51:25 GMT -06:00 True False Question 6 Of the following, is not a property of carbon. forming covalent bonds triple bond formation possessing five valence electrons reacting to form long chains called polymers forming multiple bonds Question 7 Which of the following is an element not typically found in living organisms? Se S P F Na Question 8 is a functional group found in carbohydrates. Esters Thiols Carboxylic acids Alcohols Amines Question 9 This study source was downloaded by from CourseH on 02-14-2022 16:51:25 GMT -06:00 The following functional group is an example of . Ketone Aldehyde Amide Alcohol Alkene Question 10 A is a chemical formula thatshows how the atoms of a molecule are bonded to one another. Structural formula Line bond formula Empirical formula Ionic formula Condensed formula Question 11 A collection of two or more macromolecules uniting is called a Supramolecular complex Monomer Macromolecular structure Dimer Kekule’ complex Question 12 An organic compound with this structure, C=C, contains a functional group. Alkane Alkene This study source was downloaded by from CourseH on 02-14-2022 16:51:25 GMT -06:00 Alkyne Alcohol Both b and d Question 13 What element has been called the “super glue” of the chemical world? Ca C H O N Question 14 3 / 3 pts What energy molecule is produced via respiration? ATP Creatine DNA RNA mitochondria Question 15 What would be the approximate size of a human cell? a. 0.1 inch b. 1 nm This study source was downloaded by from CourseH on 02-14-2022 16:51:25 GMT -06:00 c. 10 nm d. 10 m e. 10 cm a. b. c. d. e. Question 16 For propane, there are carbon and hydrogen atoms. 5, 12 4, 10 3, 6 3, 5 None of the above Question 17 For an organic compound, which structure is the most efficient to draw? Line bond Condensed Lewis structure Structural formula None of these Question 18 This study source was downloaded by from CourseH on 02-14-2022 16:51:25 GMT -06:00 When writing an organic functional group,scientists often write an “R” as part of the structure. What does the R indicate? Argon Rest of the molecule Routine carbon atom A string of carbon atoms None of the above Question 19 According to the module, the study of NON-carbon compounds is referred to as . Organic chemistry Inorganic chemistry Biochemistry Environmental chemistry None of the above. Question 20 The functional group was NOT discussed in this module. Alcohol Amine Aromatic Thiol All of these were discussed. Question 21 Which number would be closest to the approximate number of ribosomes in an E. coli cell? This study source was downloaded by from CourseH on 02-14-2022 16:51:25 GMT -06:00 A. 1 B. 25 C. 250 D. 25,000 E. Both c and d Question 22 Which of the following would most likely have a cell wall? Monkey cells Snake cells Red algae cells Human red blood cells All of the above Question 23 Eukaryotes have molecules that provide a protective structure. This network, which is found in all eukaryotes, is called the . Cell wall Cytoplasm Cytosol Cytoskeleton Both Cell wall and Cytoskeleton Question 24 What is the molecule responsible for gout? Luciferin Uric acid Acetic acid This study source was downloaded by from CourseH on 02-14-2022 16:51:25 GMT -06:00 Glucose Glycine Question 25 About how many different elements are found in living organisms? 9 30 50 68 92 Question 26 (Short response) All cells share a foundational property at the cellular level. Give a brief explanation of this foundational similarity. The fundamental similarity is that each cell type has a plasma membrane that separates life from nonlife. The plasma membrane acts as a barrier to most molecules but does have proteins that permitselect molecules to cross via proteins(transporters). The plasma membrane permits the cell to have a different composition of molecules inside the cell than out and defines a space for life to occur. Develop this response based on Module 1.3 information (plasma membrane). Question 27 (Short response) According to the Module, are smaller elements or large elements favored in biological molecules? Explain which one (smaller or larger) are preferred and give at least two examples of elements (smaller or larger) common in the biomolecules. Smaller elements are preferred. These elements with smaller atomic shells are favored because they can form stable covalent bonds. Strong bonds form by significant overlap of atoms, such as carbon and hydrogen permitting them to share electrons. The bond that forms requires a substantial amount of energy to break, which allows the bonds to withstand insults, such as mechanical and thermal stresses. This bond strength is good news for living organisms. Stable bonds allow cells to form, hair to grow, and skin to protect against abrasion. This study source was downloaded by from CourseH on 02-14-2022 16:51:25 GMT -06:00 These elements are common: H, C, O, N, P, S, and Cl. (Se is borderline). Larger elements tend to form ionic compounds–not covalent. Question 28 (Short response) What element is the basis for life? Describe at least two properties of this element that permit it to serve the basis for life. 1. Carbon can form strong covalent bonds with a variety of different elements. 2. Besides, carbon can form double and triple bonds with other carbon atoms and other elements (N and O). 3. Carbon can form long chains by forming numerous carbon-carbon bonds; we call these large molecules polymer. 4. Lastly, carbon can form cyclic structures, which are also called ring compounds. Develop the second property more fully. Question 29 5 / 5 pts (Short response) How does organic chemistry differ from inorganic chemistry? Organic chemistry is the study of carbon-based compounds. Inorganic chemistry is the study of all other elements, but carbon. There is no need to have separate sub-disciples for organic and inorganic chemistry, but for historical and organizational reasons, the difference exists. Question 30 5 / 5 pts (Short response) Biochemists study the chemical reactions of organisms. According to the module, what are two other aspects of living organisms that biochemists study? In the module, biochemists also study the structure and function of biomolecules and communication within and among organisms.