Chapter 13 - Chapter 13 Prokaryotes and Viruses...

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Chapter 13: Prokaryotes and Viruses Multiple-Choice Questions 1. Introduction; p. 238; easy; ans: d The oldest known fossils of prokaryotes are found in rocks dated at about ______ years old. a. 3.5 million b. 35 million c. 350 million d. 3.5 billion e. 35 billion 2. Characteristics of the Prokaryotic Cell; p. 239; moderate; ans: c Which of the following statements about prokaryotic cells is FALSE? a. They lack membrane-bounded organelles. b. They have a single, circular chromosome in the nucleoid. c. They have a simple cytoskeleton. d. They may contain extra chromosomal DNA as plasmids. e. They lack a nuclear envelope. 3. Characteristics of the Prokaryotic Cell; p. 239; moderate; ans: b Which of the following statements does NOT describe the plasma membrane of prokaryotes? a. Like eukaryotic plasma membranes, it is a lipid bilayer. b. Like eukaryotic plasma membranes, it contains proteins and sterols. c. In aerobic species, it is the site of the electron transport chain. d. In some photosynthetic species it is the site of photosynthesis. e. It has attachment sites for daughter chromosomes during cell division. 4. Characteristics of the Prokaryotic Cell; p. 239; easy; ans: e In the photosynthetic purple and green bacteria, photosynthesis occurs in the: a. pili. b. glycocalyx. c. cell wall. d. nucleoid. e. plasma membrane. 5. Characteristics of the Prokaryotic Cell; p. 239; moderate; ans: c The cell walls of Bacteria differ from those of Archaea and eukaryotes in that the cell walls of Bacteria contain: a. cellulose. b. sterols. c. peptidoglycans. d. phospholipids. e. poly-β-hydroxybutyric acid.
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2 Chapter 13 Prokaryotes and Viruses 6. Characteristics of the Prokaryotic Cell; p. 240; easy; ans: b Gram-positive and gram-negative bacteria are distinguished by differences in their: a. plasma membranes. b. cell walls. c. storage materials. d. size. e. shape. 7. Characteristics of the Prokaryotic Cell; p. 240; difficult; ans: b The cell walls of gram-positive and gram-negative Bacteria differ in that gram-positive species have cell walls: a. with less peptidoglycan. b. of greater thickness. c. consisting of two layers. d. with a layer of lipopolysaccharides. e. with a structure similar to that of the plasma membrane. 8. Characteristics of the Prokaryotic Cell; p. 240; moderate; ans: e The glycocalyx is a: a. type of bacterial plasmid. b. convoluted infolding of the prokaryotic plasma membrane. c. type of inclusion body in prokaryotic cells. d. constituent of the cell wall of gram-positive Bacteria. e. slimy or gummy substance coating the outer surface of the prokaryotic cell wall. 9. Characteristics of the Prokaryotic Cell; p. 240; easy; ans: d In prokaryotes, poly-β-hydroxybutyric acid is a storage compound occurring: a. in the nucleoid. b. in the plasma membrane. c. in the cell wall. d. as inclusion bodies. e. as fimbriae. 10. Characteristics of the Prokaryotic Cell; p. 240; moderate; ans: c Prokaryotic flagella differ from eukaryotic flagella in that prokaryotic flagella: a. are surrounded by a plasma membrane.
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