mt2_2009key

mt2_2009key - MB 451 Microbial Diversity Midterm Exam #2...

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MB 451 Microbial Diversity Midterm Exam #2 Honor pledge: “ I have neither given nor received unauthorized aid on this test. Name : ____ KEY ___________________________________________________________ Signed : _________________________________________________________________ Date : _______________________________ 1. What are the 3 primary evolutionary branches of life? (5 points) Bacteria, Archaea, Eukarya __ B __ 2. The root of the Universal phylogenetic tree was identified using analysis of . . . (2 points) A. small subunit ribosomal RNA sequences B. ancient duplicated genes C. ribosomal RNA spacer sequences D. antibiotic resistance genes E. none of the above __ C __ 3. The deep branches of the bacterial phylogenetic tree are both thermophilic and . . . (2 points) A. pathogenic B. autotrophic C. primitive D. anthropomorphic E. none of the above __ E __ 4. Which of the following phototrophic groups is/are capable of cyclic photophosphorylation? (2 points) A. Cyanobacteria B. Chloroflexi C. Chlorobi D. purple photosynthetic Bacteria E. all of the above __ E __ 5. Which of the following is not a process by which a photoautotroph can fix CO 2 ? (2 points) A. the Calvin cycle B. the reverse (reductive) TCA cycle C. the reductive acetyl-CoA pathway D. the hydroxypropionate pathway E. all of the above can be used to fix carbon __ A __6. Proteobacteria, regardless of their phenotype, obtain their energy from . . . (2 points) E. all of the above __ D __ 7. The term “Gram-positive” refers to . . . (2 points) A. a particular phylogenetic group B. a particular staining pattern C. a particular envelope structure D. it can mean any of these things E. none of the above Page 1 of 7
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__ B __ 8. Which of the following is not a likely notion of what viruses might be? (2 points) A. degenerate parasites B. spontaneous generation C. genetic offshoots of their hosts D. remnants of precellular life E. all of the above are reasonable __ D __ 9. Obligate parasites are usually _________ compared to their non-parasitic relatives. (2 points) A. slimy and underhanded B. morphological and biochemically complex C. small with simple life cycles D. simplified and rapidly-evolving E. none of the above __ A __ 10. How do we know about the many phylogenetic groups with no cultivated species? (2 points) A. rRNAs sequences PCR-ed from the environment B. from direct microscopic observations C. by statistical analysis of cultivated organisms D. phenotypic analysis of environmental samples E. all of the above __ D __ 11. Which of the following is not a general phenotype found in the Archaea? (2 points) A. sulfur-metabolizing thermophiles B. methanogens C. extreme halophiles D. opportunistic pathogens E. all of the above are common in the Archaea __ A __ 12. Which of the following does not describe a common sulfur metabolism in Archaea? (2 points)
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This note was uploaded on 12/25/2009 for the course MB 451 taught by Professor M during the Spring '07 term at N.C. State.

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mt2_2009key - MB 451 Microbial Diversity Midterm Exam #2...

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