Biology: The Dynamics of Life, North Carolina Edition

Chapter 18: Viruses and Bacteria

Viruses and Bacteria

1
Which of these statements is true?
A)Plant viruses infect the host plant through a lysogenic cycle.
B)All viral plant diseases are fatal to the host plant.
C)Increased growth and yield is always the result of viruses infecting host plants.
D)Viruses can be unintentionally spread from plant to plant through the use of an infected cutting tool.
2
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Which of the following diseases is most likely associated with the replication of a lytic virus?
A)warts
B)influenza
C)shingles
D)HIV
3
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What part of the bacterial cell is this line pointing to?
A)a chromosome
B)a pilus
C)a plasmid
D)a flagella
4
Which human disease may occur when chicken pox viruses enter the lytic cycle?
A)herpes simplex I
B)herpes simplex II
C)hepatitis B
D)shingles
5
What is a saprophyte?
A)proteins with no nucleic acid
B)an organism that obtains food from living organisms
C)an organism that feeds on dead organisms
D)a blue-green bacteria
6
Which of these is NOT a step in the lytic cycle?
A)assembly
B)provirus formation
C)replication
D)lysis and release
7
What shape category do bacteria belong to if they are spherical?
A)conicus
B)spirillum
C)coccus
D)bacillus
8
Bacteria that are killed by oxygen are called __________.
A)saprophytes
B)obligate aerobes
C)obligate anaerobes
D)archaebacteria
9
Which of these is an example of a helical virus?
A)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078675642/181857/ch18_0_a.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (13.0K)</a>
B)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078675642/181857/ch18_0_b.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (15.0K)</a>
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D)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078675642/181857/ch18_0_d.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (14.0K)</a>
10
Which of these organisms would most likely be able to successfully live in the Dead Sea?
A)eubacteria
B)viruses
C)archaebacteria
D)Bacillus anthracis
11
Which of these statements is true?
A)In most situations, polio viruses infect only brain cells.
B)A T4 phage can only infect a human cell.
C)Every virus has its own specifically shaped attachment protein.
D)A virus can replicate at any time in any location.
12
Viral DNA that becomes integrated into the chromosome of the host cell is __________.
A)a lysis
B)a capsid
C)a bacteriophage
D)a provirus
13
Which of these processes do bacteria use to reproduce?
A)Gram staining
B)binary fission
C)chemosynthesis
D)exocytosis
14
One reason that smallpox has been successfully eradicated is because __________.
A)it only infects humans
B)it never infects humans
C)it always infects birds and horses
D)it only infects birds
15
What is the virus responsible for the common cold?
A)adenovirus
B)poliovirus
C)Escherichia coli
D)rabies
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