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Name: ______________________ Chapter 27 Review _____ 1 The DNA-containing region of this bacterial cell is indicated by the letter _____ and is called the ______. A A … nucleus B B … nucleic region C C … cytoplasm D D … nucleoid region E E … nucleolus _____ 2 The structure that regulates the passage of material into and out of this bacterial cell is indicated by the letter A A. B B. C C. D D. E E. _____ 3 ______ A B C D are surface appendages that allow a bacterium to stick to a surface. Pili Flagella Cell walls Ribosomes _____ 4 What is A B C D the function of a bacterium's capsule? adhesion protection propulsion DNA containment _____ 5 Where is a bacterial cell's DNA found? A capsule B nucleus C ribosomes D nucleoid region _____ 6 In a bacterium, where are proteins synthesized? A nucleus B capsule C ribosomes D peroxisome _____ 7 What name is given to the rigid structure, found outside the plasma membrane, that surrounds and supports the bacterial cell? A pili B flagella C cell wall D peptidoglycan _____ 8 The prokaryotic cells that were the first to add significant quantities of oxygen to Earth's atmosphere are classified as A chlamydias. B spirochetes. C cyanobacteria. D proteobacteria. _____ 9 Spiral-shaped bacteria are likely to be placed with A chlamydias. B spirochetes. C cyanobacteria. D proteobacteria. _____ 10 According to this cladogram, which of these pairs of prokaryotic subgroups share the most recent common ancestor? A Euryarchaeota ... Cyanobacteria B Proteobacteria ... Crenarchaeota C Proteobacteria ... Euryarchaeota D Euryarchaeota ... Crenarchaeota _____ 11 Photoautotrophs use A CO2 as both an energy source and a carbon source. B H2S as an energy source and CO2 as a carbon source. C light as an energy source and CO2 as a carbon source. D light as an energy source and methane as a carbon source. _____ 12 Which of the following is the most common compound in the cell walls of gram-positive bacteria? A lignin B protein C cellulose D peptidoglycan _____ 13 Which of the following is the correct order, from most external to most internal? A cell wall, plasma membrane, capsule B cell wall, capsule, plasma membrane C capsule, plasma membrane, cell wall D capsule, cell wall, plasma membrane _____ 14 Which prokaryotes should be expected to be most strongly resistant to plasmolysis in hypertonic environments? A methanogens B extreme halophiles C extreme thermophiles D nitrogen-fixing bacteria that live in root nodules _____ 15 Which of the following statements about prokaryotes is TRUE? A They divide by binary fission, without mitosis or meiosis. B Their genetic material is confined within a nuclear envelope. C The persistence of bacteria throughout evolutionary time is due to genetic similarity. D Genetic variation in bacteria is not known to occur, nor should it occur, because of their asexual mode of reproduction.
