EP CAMPBELL BIO.FOCUS-MOD.MASTER.(18WK)
3rd Edition
ISBN: 9780136781851
Author: Urry
Publisher: PEARSON CO
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Chapter 17, Problem 2TYU
Summary Introduction
Introduction:
Viruses are such micro-organisms that depend on the host cells for their duplication as they lack the machinery for replication. They integrate their genome with the host cell genome. Thereby they replicate with the help of host cell machinery.
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Which of the following statements seemingly refute the fact that viruses are nonliving?
A.They reproduce themselves only inside a host cell.
B. They contain no enzymes.
C. They can change over time, with the emergence of new strains.
D. They cause diseases similar to those caused by bacteria.
E. They are composed of protein and nucleic acid.
To infect their specific host cells, viruses go through these chronological steps EXCEPT
a.
Release of progeny viruses
b.
Absorption and penetration of the viral particles
c.
Uncoating of the nucleic acid of the viral particles
d.
Synthesis and assembly of viral particle components
Which of the following is true?
A.
Viruses cannot reproduce outside a host cell.
B.
Prions are infectious proteins.
C.
Viroids lack a protein coat.
D.
Some viruses cause cancer.
E.
All of the above.
Chapter 17 Solutions
EP CAMPBELL BIO.FOCUS-MOD.MASTER.(18WK)
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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- According to their genome structure, the following viruses are correctly classified EXCEPT? a. Rabies viruses : : Linear Single -stranded RNA b. Retroviruses : : Linear Single -stranded RNA c. Papilloma viruses : : Circular Double -stranded DNA d. Small pox viruses : : Circular Double -stranded DNAarrow_forwardBacterial 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.arrow_forwardViral “spikes” are usually involved in A. Uncoating the virus particle B. Killing the host cell C. Attaching to the host cell to aid in entry or exit D. Replicating DNAarrow_forward
- (i) Describe each way viruses may be classified. And Define each of the following parts of a virus, their composition/structure, and explain their role in the viral life cycle: a. Capsid b. Capsomere c. Nucleocapsid d. Envelope e. Spikesarrow_forwardZoonotic viruses cause the same symptoms, with the same severity, in animals and in humans. A. True B. Falsearrow_forwardThink 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_forward
- Which of the following is a commonality between coxsackievirus A16 infection and a varicella zoster infection?Choose one: A. Both infections are caused by viruses in the herpes family. B. Each disease is usually mild and self-limiting in children but is more severe in adults. C. Both viruses can cause a spotted rash to appear on the palms of the hands and soles of the feet. D. There is a vaccine available for both viruses.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_forwardAn emerging virus isa. a virus that has arisen recently and is more likely to cause infectionthan previous strains.b. HIV that causes AIDS.c. a strain of influenza virus called H1N1 that causes the flu.d. all of the above.arrow_forward
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