Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 19, Problem 7TYK
Summary Introduction
Introduction: The virus that infects plants is called plant virus. The genome of most plant viruses has RNA that is single-stranded or double-stranded. Very few plant viruses have DNA as their genetic material.
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During viral infection, attachment is usually specific to a particular celltype becausea. the virus is attracted to the appropriate host cells by proteinssecreted into the extracellular fluid.b. the virus recognizes and binds to specific molecules in thecytoplasm of the host cell.c. the virus recognizes and binds to specific molecules on the surfaceof the host cell.d. the host cell produces channel proteins that provide passageways forviruses to enter the cytoplasm.e. the virus releases specific proteins that make holes in the membranelarge enough for the virus to enter.
Regarding enveloped viruses, which of the following is true of the viral envelope?
A. It has the same structure as a cell wall
B. It is resistant to soaps/detergents
C. It is composed of capsid proteins
D. It is a phospholipid bilayer derived from a membrane of its host cell
42.
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
Chapter 19 Solutions
Study Guide for Campbell Biology
Ch. 19 - In the following diagram of lytic and lysogenic...Ch. 19 - Summarize the flow of genetic information during...Ch. 19 - How does a virus spread throughout a plant? Are...Ch. 19 - Create a concept map that describes the lytic and...Ch. 19 - Prob. 2SYKCh. 19 - Prob. 1TYKCh. 19 - Prob. 2TYKCh. 19 - Prob. 3TYKCh. 19 - Prob. 4TYKCh. 19 - T2 and T4 are two types of bacteriophage that...
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- Find the wrong information about virus attachment and absorption to host cell. A. The surface capsid proteins of naked viruses bind to a specific cell receptor on host cell. B. For enveloped viruses, the spikes are responsible for binding to a specific cell receptor. C. A cell lacking a receptor for a specific virus is not infected by that virus. D. Animal viruses, such as HIV are highly specific and they can only infect particular cell types. E. All of these are true.arrow_forwardThe following statements are correct, except? a. Non-enveloped viruses bind to their host cells via their capsid surface. b. The cell receptor may determine the host range and tissue tropism of viruses. c. Virus particles bind to receptors on their host cells to initiate entry. d. Naked virus particles bind via their transmembrane glycoproteins.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
- The envelope of an enveloped virus is derived from a. The lysosome of the cell b. The cell membrane of the cell C. The endoplasmic reticulum of the cell d. The mitochondrion of the cell e The Golgi apparatus of the cellarrow_forwardWhich of the following is NOT a feature associated with viruses? a. Cytoplasm c. Protein coat b. Genetic information d. Envelopearrow_forwardYou are attending a presentation at your local gardening supply store. The speaker warns that insects such as aphids that infest your garden may cause viral plant infections. Explain the link between insects and plant viruses.arrow_forward
- Viruses may include of any of the following structures, EXCEPT: a. DNA b. ribosomes c. capsids d. viral envelopes e. RNAarrow_forwardwhat is the mechanism of action for penicillins? a. injury to plasma membrane b. inbibition of protein synthesis c. inhibition of cell wall synhesis d. inhibition of nucleic acid synthesis e. none of the above describes the mechanism of action for penicillinsarrow_forwardThe envelope of enveloped -viruses : a. Determines the viral morphology b. Both choices are false c . Protects the viral genome d. Both choices are correctarrow_forward
- Many scientists start believing that plant viruses may be responsible for human disorders. Yes or yes; explain.arrow_forwardDefine the following terms: a. negative sense RNA virus b. vDNA c. proviral DNA d. macropinocytosis e. temperate phagearrow_forwardExplain the principle of a plant virus that transmits through an animal vectorarrow_forward
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