exam 2 practice

exam 2 practice - BIOL 51/Principles of Biology/K. Land...

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1 BIOL 51/Principles of Biology/K. Land Name____________________________________ Exam 2/October 20, 2006 SLIDE SHOW (2 points each): 1. ______________________________________________ 2. ______________________________________________ 3. ______________________________________________ 4. ______________________________________________ 5. ______________________________________________ MULTIPLE CHOICE (2 points each) Directions: Read each question carefully and pick the one BEST choice for each question. Indicate your choice on the scantron sheet. 1. Which of the following is NOT found in the cell wall of gram negative bacteria? A) Dipicolinic acid B) N-acetylmuramic acid C) Amino acids D) N-acetylglucosamine E) lipolysaccharide 2. Chemotaxis in flagellated prokaryotes is controlled by A) Addition and removal of phosphates (-PO4) to the flagellar filament B) Addition and removal of phosphates (-PO4) to the basal body C) Addition and removal of methyls (-CH3) to the flagellar filament D) Addition and removal of methyls (-CH3) to the basal body E) None of the above choices 3. The first dye utilized in a gram stain is A) safranin B) iodine C) crystal violet D) methylene blue E) ethyl alcohol 4. Mycoplasmas are bacteria that lack cell walls. On the basis of this structural feature, which of the statements below is true about mycoplasmas? A) They are gram-negative. B) Infections with mycoplasmas should not be treated with penicillin. C) They lack a cell membrane as well. D) They undergo ready fossilization in sedimentary rock. E) They possess typical prokaryotic flagella. 5. Which of the following is the most common compound in the cell walls of gram-positive bacteria? A) cellulose B) lipopolysaccharide C) lignin D) peptidoglycan
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2 E) protein 6. Which two structures play direct roles in permitting bacteria to adhere to each other, or to other surfaces? 1. capsules 2. endospores 3. fimbriae 4. plasmids 5. flagella A) 1 and 2 B) 1 and 3 C) 2 and 3 D) 3 and 4 E) 3 and 5 For the following questions, use the list below of types of bacterial metabolism. Pick the term that best matches the statement. Responses may be used once, more than once, or not at all. A. photoautotrophs B. photoheterotrophs C. chemoautotrophs D. chemoheterotrophs that perform decomposition E. parasitic chemoheterotrophs 7) responsible for many human diseases 8) cyanobacteria 9) use light energy to synthesize organic compounds from CO 2 10) obtain energy by oxidizing inorganic substances; energy that is used, in part, to fix CO 2 11) use light energy to generate ATP but do not release oxygen 12) responsible for high levels of O 2 in Earth's atmosphere 13) According to the endosymbiotic theory of the origin of eukaryotic cells, how did mitochondria originate? A) from infoldings of the plasma membrane, coupled with mutations of genes for oxygen-using metabolism
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exam 2 practice - BIOL 51/Principles of Biology/K. Land...

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