Biology
12th Edition
ISBN: 9781260494570
Author: Raven, Peter
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 26, Problem 5U
Why is a drug that blocks HIV binding to one of its cell surface receptors not effective at treating influenza?
- a. HIV and influenza viruses have different receptors to which they bind.
- b. HIV and influenza viruses use different types of genetic material.
- c. The mechanism for genome replication in HIV and in influenza viruses is different.
- d. HIV causes a chronic infection; influenza causes an acute infection.
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Students have asked these similar questions
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
Chapter 26 Solutions
Biology
Ch. 26.1 - Prob. 1LOCh. 26.1 - Prob. 2LOCh. 26.2 - Prob. 1LOCh. 26.2 - Prob. 2LOCh. 26.3 - Prob. 1LOCh. 26.3 - Describe how viruses can contribute DNA to their...Ch. 26.4 - Describe the differences between acute and...Ch. 26.4 - Prob. 2LOCh. 26.4 - Prob. 3LOCh. 26.5 - Prob. 1LO
Ch. 26 - Prob. 1UCh. 26 - Prob. 2UCh. 26 - Prob. 3UCh. 26 - Prob. 4UCh. 26 - Why is a drug that blocks HIV binding to one of...Ch. 26 - Prob. 6UCh. 26 - Prob. 7UCh. 26 - Prob. 1ACh. 26 - Prob. 2ACh. 26 - Prob. 3ACh. 26 - Prob. 4ACh. 26 - Prob. 5ACh. 26 - Prob. 6ACh. 26 - Prob. 7ACh. 26 - E. coli lysogens derived from infection by phage ...Ch. 26 - Prob. 2SCh. 26 - Prob. 3SCh. 26 - Prob. 4SCh. 26 - Prob. 5S
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- People with the CCR5Δ32 mutation of a T-cell surface protein can be exposed to some strains of HIV-1 without becoming sick. What step of the virus life cycle is likely to be inhibited with this mutation? a. Release b. Reverse transcription c. Uncoating d. Attachmentarrow_forwardMany viruses enter host cells through receptor-mediated endocytosis, What is an advantage of this entry strategy? A. The virus directly enters the cytoplasm of the cell B The virus only enters its target host cell type. C. The virus is protected from recognition by white blood cells. D. The virus can directly inject its genome into the cell's nucleus.arrow_forwardWhich part of the SARS-CoV2 virus is produced by your immune system in response to the Pfizer or Moderna vaccine? a. Viral RNA b. Viral DNA c. Spike Protein d. Envelope Protein e. Membrane Proteinarrow_forward
- Which receptors of the influenza virus are responsible for binding tothe host cell?a. hemagglutinin b. neuraminidase c. type A d. capsid proteinsarrow_forwardWhich of these is true of prions?a. They are small RNA viruses.b. They replicate in the nucleus.c. They lack protein.d. They cause death of brain cells.arrow_forwardHow does genetic therapy differ from traditional methods of treating a disease? a. It targets the effects of the disease b. In some cases, it fixes the genetic code itself c. It reverses the damage done to the body d. It replaces the need for organ transplantarrow_forward
- What are prions? A. misfolded versions of normal proteins that can cause disease B. mobile segments of DNA C. tiny circular molecules of RNA that can infect plants D. viral proteins that attach to the genome of a host and cause diseasearrow_forwardA virus is isolated, and individual virions appear spherical. What type of virus is this? A. Bacteriophage B. Helical C. Icosahedral D. Lysogenicarrow_forwardAt which stage in viral replication does the genetic information enter the host cell? a. Penetration c. Assembly b. Synthesis d. Releasearrow_forward
- What is a prion? a. A highly wound circle of RNA b. A virus that has not yet acquired its envelope c. A protein that can alter the shape of a second protein d. The protein associated with a latent virusarrow_forwardafter a successful infection by a viral particle, it integrates its genome into the host DNA. which term best describe the change of host genome? a. none b.silent mutation c.missense mutation d.frame shift mutationarrow_forwardWhich statement is true of reverse transcriptase? a. It is a nucleic acid. b. It infects cells. c. It transcribes RNA to make DNA. d. It is a lipid.arrow_forward
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