Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 17, Problem 6TYK
Summary Introduction
Introduction:
Viruses are biological entities that contain
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A positive-strand RNA virus:
a.must first be converted to a mRNA before viralproteins can be translated
b.is not recognized by host ribosomes.
c.can directly translate viral proteins.
d.will be degraded by host enzymes.
e.needs RNA dependent RNA polymerase to get converted into mRNA
Bacterial viruses and animal viruses are similar in that they both
a. have only DNA as genetic material.
b. have only RNA as genetic material.
c. require host functions for some aspect of their life cycle.
d. do not require any host proteins.
Viruses contain either DNA or RNA. Viruses possess their own metabolic system
a. FIRST statement is TRUE; SECOND statement is FALSE
b. BOTH Statements are TRUE
c. FIRST statement is FALSE; SECOND statement is TRUE
d. BOTH statements are FALSE
Chapter 17 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 17.1 - What are the properties of F+, F-, and Hfr cells...Ch. 17.1 - Prob. 2SBCh. 17.2 - Prob. 1SBCh. 17.2 - How does viral infection of an animal cell and a...Ch. 17.2 - Prob. 3SBCh. 17.3 - Prob. 1SBCh. 17 - Prob. 1TYKCh. 17 - Prob. 2TYKCh. 17 - Which of the following is not correct for...Ch. 17 - Prob. 4TYK
Ch. 17 - Prob. 5TYKCh. 17 - Prob. 6TYKCh. 17 - When a virus enters the lysogenic stage: a. the...Ch. 17 - An infectious material is isolated from a nerve...Ch. 17 - Prob. 9TYKCh. 17 - Prob. 10TYKCh. 17 - Prob. 11TYKCh. 17 - Discuss Concepts As a control for their...Ch. 17 - Prob. 13TYKCh. 17 - Prob. 14TYKCh. 17 - Prob. 15TYKCh. 17 - Prob. 1ITD
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- Which of the following statements about viruses is false? a. Viruses require a host cell to reproduce. b. Viruses are sensitive to interferons. c. Viral infections can generally be controlled with antibiotics. d. Viruses encode their own genome.arrow_forwardWhich of the following statements correctly describes viruses? Select one: A. They can reproduce by dividing. B. They cannot reproduce without a host cell. C. They have a genome similar to prokaryotic and eukaryotic cells. D. They can carry out their own metabolic activities.arrow_forwardSymptoms of viral infections are caused by: (choose all that apply) A. Actions of the virus that result in cell damage or death B. Actions of the immune system that result in cell damage or death C. Changes in a cell's genetics that result in cancerarrow_forward
- Viruses may include of any of the following structures, EXCEPT: a. DNA b. ribosomes c. capsids d. viral envelopes e. RNAarrow_forwardViruses are acellular because a. they are biological entities that do not have a cellular structure. b. they are known as virions that obtain their genetic materials from their host c. they are only fragments of non living material. d. None from choices a-carrow_forwardAn experimental drug therapy to treat patients with antibiotic-resistant bacteria involves introduction of a highly specific bacteriophage to the infected patient's bloodstream. Which of the following bacteriophage types would be the LEAST useful for this therapy? a. a lytic bacteriophage b. An enveloped virus c. An RNA virus d. a lysogenic bacteriophagearrow_forward
- Think about the cells that viruses infect. Pick out the correct statements below. A. The host cell has some particular thing - be it machinery, chemistry or whatever - that the virus MUST have in order to successfully reproduce. B. Viruse generally don't care what cells they infect. C. Viruses can only replicate in particular hosts and tissues. D. The host range or tissue specficity means the specific type of cells the virus infects. Example - rabies infects neural cells.arrow_forwardViruses are not considered to be alive because: (choose all that apply) Virus Basics Viruses are not considered to be alive because: (choose all that apply) A. They do not grow B. They cannot reproduce on their own C. They are not made of cells D. They do not contain genetic material (such as DNA)arrow_forwardWhich of the following is a reason that scientists do not classify viruses as living things? A. They must infect a host because they cannot reproduce on their own. B. They contain DNA, like all living organisms. C. The experience evolution through natural selection. D. They replicate themselves and reproducearrow_forward
- A researcher, studying two different animal viruses (A and B) that infect the same cell type, digests away all the protein and transfers the nucleic acid directly into the host cell. Only virus B causes the infection. This suggests: a. Virus A is likely to be a naked virus. b. Virus A is likely to be an enveloped virus. c. Virus A is likely to be a -ssRNA virus. d. Virus A is likely to be a +ssRNA virus. e. Virus A is likely to be a dsDNA virus. And now explain why.arrow_forwardMost viruses use their own virally encoded: a. DNA/RNA polymerase b. Endoplastmic reticulum c. Ribosomes d. Mitochondriaarrow_forwardThere is a big debate if viruses are alive or not. Either way, look at the list below and pick out the accurate statements. A. Can only reproduce/replicate in a living cell. B. They have a protein coat surrounding and protecting the nucleic acid. C. Viruses have either DNA OR RNA - not both D. They sometimes have an envelope.arrow_forward
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