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EvoPset1Questions2013

Pick all that apply a a large population size b

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The rapid evolution of HIV is aided by? Pick ALL that apply: A. a large population size B. population bottlenecks C. its small size D. its multiple origins from SIV E. error-prone reverse transcription (leading to a high mutation rate) F. a short generation time G. the similarity of chimpanzees to humans H. none of the above Mark for Review What's This? Question 8 of 22 4.0 Points For what reason(s) was the Miller-Urey experiment significant? Pick ALL that apply: A. The experiment lended significant support to confirm the “RNA World” hypothesis. B. New amino acids were discovered in the experiment. C. Complex organic compounds were synthesized from inorganic molecules that were likely in abundance in the Earth’s prebiotic atmosphere. D. The semi-conservative nature of DNA replication was proved. E. The experiment supported the endosymbiotic theory for development of complex cell structures. F. Scientists were able to rule out light as a critical element in the origin of life. G. The experiment was able to synthesize simple, single-celled organisms from abiotic precursors, using conditions that simulated the prebiotic atmosphere of the Earth. H. none of the above Mark for Review What's This? Question 9 of 22 4.0 Points What is the specific mechanism(s) of action by which AZT combats HIV? Pick ALL that apply: A. it specifically inhibits the attachment of HIV to the host cell B. it specifically inhibits integration of full length viral DNA into the host genome C. it cannot be incorporated into the growing strand of new DNA D. it results in termination of reverse transcriptase-based synthesis of RNA E. it results in termination of reverse transcriptase-based synthesis of DNA F. it does not bind to the active site of the reverse transcriptase enzyme but it does bind to the active site of DNA polymerase Mark for Review What's This? Question 10 of 22 4.0 Points
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4/5/13 8:17 PM 2013 Problem Set 1 on Evolution Lectures 1-3 Page 4 of 8 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment A certain virus (Virus A) mutates at a rate of 10^-5/nucleotide/generation. Another Virus (Virus B) has a mutation rate of 10^-4/nucleotide/generation. You isolate and sequence multiple virus A and virus B genomes and find that the degree of sequence divergence within the Virus A population is higher than that within the Virus B population. Which of the following can possibly explain this observation? Pick ALL that apply: A. More of the mutations in Virus A impair its function, i.e. are deleterious B. The common ancestor of the strains of Virus A is older than that of Virus B C. The generation time of Virus A is longer than the generation time of Virus B D. Virus A has a DNA genome whereas Virus B has an RNA genome E. The mutation rates across the two viruses cannot be compared because of differences in genome size.
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Pick ALL that apply A a large population size B population...

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