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final08key - Final Exam MB 451 Microbial Diversity Honor...

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Final Exam MB 451 Microbial Diversity Honor pledge: “ I have neither given nor received unauthorized aid on this test. Signed : _____ Key _______________________________________________________ Date : __________________________ Name : _____________________________________________________________ 1. What are the 3 primary evolutionary branches of life? (5pts) Bacteria Archaea Eukarya 2. What is horizontal transfer ? (2 pts) The transfer of genes from one organism to another that is not its offspring 3. List the possible scenarios for the origin of viruses. (3 pts) 1. genetic offshoots ('satellites') of their hosts 2. remnants of precellular life 3. degenerate parasites Page 1 of 9
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4. __ E __ Thermophiles have to deal with what issue(s) com- pared to mesphiles? (2pts) A. membrane fluidity B. DNA/RNA/protein denaturation C. small molecule stability D. balancing enzymatic function E. all of the above 5. __ A __ The genomes of obligate parasites are what com- pared to free-living relatives? (2pts) A. simplified B. more complex C. divided into multiple chromosomes D. more condensed E. none of the above 6. __ C __ Large-scale genomic sequencing of environmental DNA is known as … (2pts) B. pyrosequencing C. metagenomics D. shotgun sequencing E. all of the above 7. __ B __ All endospore-forming Bacteria are members of the ... (2pts) A. Actinobacteria B. Firmicutes C. Crenarchea D. cyanobacteria E. none of the above 8. __ E __ The planctomycetes … (2pts) A. lack peptidoglycan B. have external fibrous stalks C. divide by budding D. contain an internal cell membrane E. all of the above 9. __ B __ Secondary metabolites are produced during … (2pts) A. log phase B. stationary phase C. thermal stress D. nitrogen limitation E. all of the above 10. __ C __ Which of the following is not a sulfur metabolism found in Archaea? (2pts) A. sulfur oxidation B. sulfur reduction C. sulfur fermentation D. sulfur respiration E. All of the above are used by Archaea 11. __ B __ Which of the following is not a common phenotype of Archaea? (2pts) A. sulfur-metabolizing thermophiles B. pathogens C. methanogens D. halophiles E. none of the above 12. __ A __ Which of the following groups of eukaryotes lack mitochondria? (2pts) A. archaeozoans B. alveolates C. ciliates D. heterokonts E. all of the above have mitochondria 13. __ D __ Insect gut Arthromitis is … (2pts) A. Bacillus anthracis B. Bacillus thuringensis C. Bacillus antibioticus D. Bacillus cereus E. Arthrobacter mitis Page 2 of 9
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14. For each genus, give the major phylogenetic group to which it belongs. Answer 20 out of the 24 ; if you answer more, only the
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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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final08key - Final Exam MB 451 Microbial Diversity Honor...

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