Test Bank for Foundations in Microbiology 8th Edition Talar

Full file at Chapter 02 Testbank Student: ___________________________________________________________________________ 1. Anything that occupies space and has mass is called A. an electron. B. livin g. C. matte r. D. energy . E. space . 2. The electrons of an atom are A. always equal to the number of neutrons in an atom. B. found in the nucleus. C. used to determine atomic number. D. positively charged. E. moving in pathways called orbitals. 3. All of the following pertain to the atom 14 6c except it(s) A. has 6 protons. B. has 6 electrons. C. has 14 neutrons. D. is an isotope of carbon. E. mass number is 14. Full file at 4. The subatomic particles that surround the nucleus are the A. electron s. B. proton s. C. neutron s. D. protons and neutrons. E. protons and electrons. 5. Cations are A. charged subatomic particles. B. atoms that have gained electrons. C. radioactive isotopes. D. capable of forming ionic bonds with anions. E. atoms without protons. 6. Isotopes are atoms of the same element that differ in their A. neutron number. B. electron number. C. proton number. D. atomic number. E. chemical properties. 7. What is the maximum number of electrons in the second energy shell of an atom? A. 2 B. 4 C. 8 D. 1 8 E. 3 2 Full file at 8. Two or more atoms bonded together are called a/an A. ion . B. isotop e. C. elemen t. D. electrolyt e. E. molecul e. 9. What would be the valence number of electrons in the sulfur atom 32 16s? A. 2 B. 6 C. 8 D. 1 6 E. 3 2 10. Polar molecules are composed of covalently bonded A. identical atoms. B. carbon atoms. C. ions . D. atoms of different electronegativity. E. atoms of identical electronegativity. 11. Reactions involving electron release are called ______ reactions. A. oxidatio n. B. reductio n. C. ionizatio n. D. decompositio n. E. dissolutio n. Full file at 12. Which of the following represents a synthesis reaction? A. AB → A + B B. A + B → AB C. AB + XY → AX + BY D. AB + XY ↔ AX + BY E. None of the choices are correct. 13. The important solvent associated with living things is A. carbon dioxide. B. sodium chloride. C. ethyl alcohol. D. benzen e. E. wate r. 14. Which term does not belong in this list? A. lactic acid B. vineg ar C. hydrogen ion donor D. pH 8 E. acidi c 15. A solution of pH 7 compared to a solution of pH 9 A. is more basic. B. has no OHions. C. has more H+ ions. D. has a higher pH. E. All of the choices are correct. Full file at 16. What do H2O, NaCl, CO2, and HCl all have in common? A. all salts B. all acids C. all gases D. all inorganic E. all solutes 17. Which of the following functional groups is mismatched to the organic compound? A. phosphate - carbohydrates B. sulfhydryl - proteins C. amino - proteins D. hydroxyl - alcohols E. carboxyl - fatty acids 18. The building blocks of an enzyme are A. nucleotide s. B. glycerol and fatty acids. C. monosaccharid es. D. phosphate, glycerol, fatty acids. E. amino acids. 19. All of the following are monosaccharides except A. glucos e. B. glycoge n. C. fructos e. D. ribos e. E. deoxyribos e. Full file at 20. All of the following are lipids except A. cholester ol. B. starc h. C. phospholipi d. D. wax . E. triglycerid e. 21. A monosaccharide with 5 carbon atoms will have _____ hydrogen atoms and _____ oxygen atoms. A. 10, 5 B. 5, 10 C. 5, 5 D. 10, 10 E. 2, 1 22. One nucleotide contains A. one phosphate. B. one pentose. C. one nitrogen base. D. All of the choices are correct. E. None of the choices are correct. 23. Which of the following would have glycosidic bonds? A. triglycerid es B. monosaccharid es C. polypeptid es D. polysaccharid es E. ATP Full file at 24. All of the following are polysaccharides, except A. dextran in some bacterial slime layers. B. agar used to make solid culture media. C. a cell's glycocalyx. D. cellulose in certain cell walls. E. prostaglandins in inflammation. 25. What part of a phospholipid forms hydrophobic tails? A. fatty acids B. glycer ol C. phospha te D. alcoh ol E. All of the choices are correct. 26. An amino acid contains all of the following, except A. an amino group. B. a carboxyl group. C. a variable R group. D. an a carbon. E. a nitrogen base. 27. Which pertains to DNA but not to RNA? A. contains ribose B. contains adenine C. contains thymine D. contains uracil E. contains nucleotides Full file at 28. ATP is best described as A. an enzyme. B. a double helix. C. an electron carrier. D.the energy molecule of cells. E. All of the choices are correct. 29. Which is not true about enzymes? A. found in all cells B. are catalysts C. participate in the cell's chemical reactions D. can be denaturated by heat and other agents E. have high-energy bonds between phosphates 30. Which amino acid contains sulfur atoms that form covalent disulfide bonds in its tertiary structure? A. valin e B. cystein e C. serin e D. alanin e E. tyrosin e 31. The nucleic acid that delivers the correct amino acid for protein synthesis is A. rRNA . B. DNA . C. tRNA . D. mRNA . E. ATP. Full file at 32. The purine bases in nucleic acids include A. thymine and cytosine. B. guanine and adenine. C. cytosine and guanine. D. adenine and thymine. E. ribose and deoxyribose. 33. A weak, attractive force between nearby molecules is called a/an A. hydrogen bond. B. covalent bond. C. ionic bond. D. peptide bond. E. glycosidic bond. 34. A student forgot to label a beaker containing a DNA solution and a beaker containing a glucose solution. If chemical analysis was performed to identify the contents of each beaker, which of the following would be found in the beaker of DNA but not in the beaker with glucose? A. amino acids B. hydrogen and oxygen atoms C. nitrogen and phosphorus D. fatty acids E. carbon atoms Full file at 35. C6H12O6 + C6H12O6→ C12 H22O11 + H2O represents A. formation of a peptide bond. B. a decomposition reaction. C. denaturatio n. D. formation of a polysaccharide. E. dehydration synthesis. 36. The atomic number equals the number of __________ an atom possesses. A. neutro ns B. proton s C. protons plus electrons D. neutrons plus protons E. electrons plus protons 37. If carbon has an atomic number of 6 and an atomic mass of 14, how many neutrons does it have? A. 6 B. 7 C. 8 D. 1 4 E. impossible to determine 38. The neutrons of an atom are A. always equal to the number of protons in an atom. B. found in the nucleus. C. used to determine atomic number. D. positively charged. E. moving in pathways called orbitals