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Study_questions_week-1_13

In a person taking both azt and the new drug you

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82) In a person taking both AZT and the new drug, you would expect to find (in at least some of the specified cells): A) RNA chromosomes, but not newly synthesized DNA chromosomes, of HIV within CD4 + helper T-cells B) RNA chromosomes, but not newly synthesized DNA chromosomes, of HIV within red blood cells C) Both RNA chromosomes and DNA chromosomes of HIV in CD4 + helper T-cells D) newly synthesized reverse-transcriptase in CD4 + helper T-cells E) Both answers A & B are correct 83) In a person taking both AZT and the new drug you would expect to find: A) Shorter lifespan compared to an individual taking neither drug B) Shorter lifespan compared to an individual taking AZT alone E) Both answers A & B are correct 84) Based on studies of antibiotic resistance and resistance of HIV to AZT that were described in class, about how long would you expect the new drug to remain effective at controlling the HIV virus? 85) If AIDS were caused by a virus like the influenza virus, then Use the following information for the next 5 questions (until you see a solid line): Suppose that an asexual virus has recently spread to humans, in which it causes a severe respiratory disease that can kill infected people. There is no genetic variation for resistance to the virus, but antiviral drugs (anti- V[A] and anti-V[B]) help to reduce mortality of infected people. The following table shows the survival (probability that an infecting virus survives and produces progeny virus that can infect new people) and fecundity rate (number of progeny virus produced by a surviving virus that are released into the environment at the end of an infection) of viruses with different genotypes. untreated with anti viral drugs __
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Genotype Phenotype survival fecundity Wt wild type 0.4 1000 A resist anti-V[A]-resistant 0.4 500 B resist anti-V[B]-resistant 0.3 1000 Treatment of a human with an antiviral drug (A or B) reduces by 50% the survival of any genotype not carrying the matching resistance allele.
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