Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
3rd Edition
ISBN: 9780134895727
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Publisher: PEARSON
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Textbook Question
Chapter 17.2, Problem 2CC
MAKE CONNECTIONS The RNA virus in Figure 17.7 has a viral RNA polymerase that functions in step 3 of the virus’s replicative cycle. Compare this with a cellular RNA polymerase In terms of template and overall function (see Figure 14.10).
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BONUS: Why do RNA viruses such as the COVID coronavirus, influenza virus and HIV have much
higher mutation rates than DNA viruses such as Herpes viruses?
O DNA polymerases which copy viral RNA have much higher mutation rates than RNA polymerases which copy
viral DNA
O RNA polymerases which copy viral RNA have much higher mutation rates than DNA polymerases which copy
viral DNA
RNA viral 60S ribosomes make many ore mutations than DNA viral 40S ribosomes
O RNA viral gyrases make more mistakes than DNA viral helicases
You are studying a new retrovirus. The viral protein (X) appears to play a role in the export of the viral genomes to the
cytoplasm. Protein X brings viral DNA to the cytoplasm and returns back to the nucleus after genome export is complete.
Researchers have developed a new drug for the virus. Following treatment with the new drug, the viral protein stays in the
nucleus and cannot export the viral genomes. What is the most plausible and logical function of the drug? Use your
knowledge of nuclear transport to answer this question.
O A. The drug inhibits the binding of the viral protein and the viral genomes to the import receptor.
B. The drug inhibits the binding of Ran-GTP to the nuclear export receptor in nucleus.
C. The drug promotes the Ran GAP activity.
D. The drug blocks the NLS on the viral protein.
Viruses with negative sense RNA genomes typically, make proteins by: (Ignore retroviruses, and the unusual characteristics of coronaviruses)
Translation of short RNA transcripts generated by RDRP
Generating a DNA copy, which is then transcribed by host RNA polymerase.
Translation of the viral genome by host ribosomes.
Production of a polyprotein, which must be cleaved into smaller proteins.
Generating a negative sense genome copy, which is then translated by host ribosomes.
Chapter 17 Solutions
Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
Ch. 17.1 - Compare the structures of tobacco mosaic virus and...Ch. 17.1 - Prob. 2CCCh. 17.2 - Compare the effect on the host cell of a ly1ic...Ch. 17.2 - MAKE CONNECTIONS The RNA virus in Figure 17.7 has...Ch. 17.2 - Why is HIV called a retrovirus?Ch. 17.2 - MAKE CONNECTIONS Compare the CRISPR system to the...Ch. 17.3 - Describe two ways in which a preexisting virus...Ch. 17.3 - Contrast horizontal and vertical transmission of...Ch. 17.3 - Prob. 3CCCh. 17 - which of me following characteristics. structures....
Ch. 17 - Prob. 2TYUCh. 17 - A human pandemic is A. a viral disease that...Ch. 17 - Prob. 4TYUCh. 17 - RNA viruses require their own supply of certain...Ch. 17 - Prob. 6TYUCh. 17 - Prob. 7TYUCh. 17 - Prob. 8TYUCh. 17 - FOCUS ON ORGANIZATION While viruses are considered...Ch. 17 - SYNTHESIZE YOUR KNOWLEDGE Oseltamivir (Tamiflu),...
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