BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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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_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_forwardWhich receptors of the influenza virus are responsible for binding tothe host cell?a. hemagglutinin b. neuraminidase c. type A d. capsid proteinsarrow_forward
- Which 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_forwardWhat 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_forwardAt which stage in viral replication does the genetic information enter the host cell? a. Penetration c. Assembly b. Synthesis d. Releasearrow_forward
- A virus is isolated, and individual virions appear spherical. What type of virus is this? A. Bacteriophage B. Helical C. Icosahedral D. Lysogenicarrow_forwardA patient presents at the clinic with an acute viral infection. Assays that analyze the viral life cycle classify the virus into Group V with a segmented genome. Which virus is the most likely diagnosis for the patient? a. Rabies virus b. Picornavirus c. HIV-1 d. Influenza A virusarrow_forwardWhat 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_forward
- after 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_forwardWhat type of virus is more vulnerable to being inactivated? a. Non-enveloped b. enveloped viruses c. RNA viruses d. DNA virusesarrow_forwardHow do retrovirus assemble new viral progeny? a. Viral RNA is copied into DNA, then integated into the host genome and transcribed ans translated b.Viral DNA is copied into RNA, then integated into the host genome and transcribed and translated c. Retroviruses use the same machinery as prokaryotes and follow the same process to make RNA d. Retroviruses have an RNA genome instead of DNA but use all of the same enzymes as eukaryotesarrow_forward
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