Biology
Biology
12th Edition
ISBN: 9781260494570
Author: Raven, Peter
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 26, Problem 5U

Why is a drug that blocks HIV binding to one of its cell surface receptors not effective at treating influenza?

  1. a. HIV and influenza viruses have different receptors to which they bind.
  2. b. HIV and influenza viruses use different types of genetic material.
  3. c. The mechanism for genome replication in HIV and in influenza viruses is different.
  4. d. HIV causes a chronic infection; influenza causes an acute infection.
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How does a retrovirus prepare its genetic material for incorporation into the host cell genome?   a. Host enzymes incorporate viral RNA directly into the genome.   b. Host enzymes covert viral RNA to double-stranded viral DNA.   c. Viral reverse transcriptase uses viral RNA to make double-stranded viral RNA.   d. Viral reverse transcriptase uses viral RNA to make double-stranded viral DNA.   e. Viral reverse transcriptase uses viral single-stranded DNA to make double-stranded viral DNA.
Why are vaccines and/or passive immunization the method of choice in the treatment or prevention of viral infections? A. There are no known inhibitors to reverse transcription B. Viruses are non-living and do not have their own genetic mechanisms to reproduce by themselves hence host cells must rely on targeting the virus or their products. C. Antibodies prevent replication of viral genome D. Antibodies prevent transcription and translation of viral genomes E. All of these
What is the significance of negative strand synthesis of positive a ssRNA virus?   a. Loss of Function b. Transcription of negative and positive strands c. Ensures that mutations are less likely to occur to the genetic material d. Acts as complementary template for the positive strand
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