MC 224 The genome of which of the following types of animal
Text: discover biology
Subject: biology
Text: microbiology
Subject: microbiology with diseases by taxonomy
The genome of which of the following types of animal virus can act directly as mRNA?
ANSWER
+ssRNA viruses
114. Which of the following types of animal virus requires RNA-dependent
RNA transcriptase to be replicated?
ANSWER
-ssRNA viruses
115. In contrast to most dsDNA animal viruses, the poxviruses replicate solely in the
cytoplasm of the host cell. this fact implies that the viral genome may encode
ANSWER
a DNA polymerase
116. Which of the following membranes can give rise to a viral envelope?
ANSWER
the nuclear and cytoplasmic membranes and the endoplasmic reticulum
,MC 224 The genome of which of the following types of animal
117. A cell is infected with a virus carrying an oncogene sequence in its genome. What
process may occur if the oncogenes expressed in the infected cell?
,MC 224 The genome of which of the following types of animal
ANSWER
neoplasia
118. How is the HIV provirus different from a lambda-phage prophage?
ANSWER
The HIV provirus is integrated permanently into the host cell's DNA
119. Which of the following laboratory procedures is used for culturing animal viruses
in the laboratory?
ANSWER
both cell cultures and embryonated eggs
120. One mechanism by which viruses may cause cancer is to interrupt the genetic
regulatory sequences of repressor proteins. which of the following types of viruses is
most likely to be involved in causing cancer by this mechanism?
ANSWER
retroviruses
121. Tumors invade other organs and tissues in a process called
ANSWER
metastasis
122. Plaque assays are used for
ANSWER
determine the density of phage in a culture.
, MC 224 The genome of which of the following types of animal
123. Diploid cell cultures and continuous cell cultures differ in which of the following ways?
ANSWER
both longevity and source of cells
124. Viroids infect
ANSWER
plants
125. How are prions different from all other known infectious agents?
ANSWER
they lack nucleic acid
126. The viruses of fungi have RNA genomes and lack a capsid. they are therefore
similar to
ANSWER
prions
127. A lipid membrane is present in which of the following?
ANSWER
enveloped viruses
128. Some human viruses are difficult to study because
Text: discover biology
Subject: biology
Text: microbiology
Subject: microbiology with diseases by taxonomy
The genome of which of the following types of animal virus can act directly as mRNA?
ANSWER
+ssRNA viruses
114. Which of the following types of animal virus requires RNA-dependent
RNA transcriptase to be replicated?
ANSWER
-ssRNA viruses
115. In contrast to most dsDNA animal viruses, the poxviruses replicate solely in the
cytoplasm of the host cell. this fact implies that the viral genome may encode
ANSWER
a DNA polymerase
116. Which of the following membranes can give rise to a viral envelope?
ANSWER
the nuclear and cytoplasmic membranes and the endoplasmic reticulum
,MC 224 The genome of which of the following types of animal
117. A cell is infected with a virus carrying an oncogene sequence in its genome. What
process may occur if the oncogenes expressed in the infected cell?
,MC 224 The genome of which of the following types of animal
ANSWER
neoplasia
118. How is the HIV provirus different from a lambda-phage prophage?
ANSWER
The HIV provirus is integrated permanently into the host cell's DNA
119. Which of the following laboratory procedures is used for culturing animal viruses
in the laboratory?
ANSWER
both cell cultures and embryonated eggs
120. One mechanism by which viruses may cause cancer is to interrupt the genetic
regulatory sequences of repressor proteins. which of the following types of viruses is
most likely to be involved in causing cancer by this mechanism?
ANSWER
retroviruses
121. Tumors invade other organs and tissues in a process called
ANSWER
metastasis
122. Plaque assays are used for
ANSWER
determine the density of phage in a culture.
, MC 224 The genome of which of the following types of animal
123. Diploid cell cultures and continuous cell cultures differ in which of the following ways?
ANSWER
both longevity and source of cells
124. Viroids infect
ANSWER
plants
125. How are prions different from all other known infectious agents?
ANSWER
they lack nucleic acid
126. The viruses of fungi have RNA genomes and lack a capsid. they are therefore
similar to
ANSWER
prions
127. A lipid membrane is present in which of the following?
ANSWER
enveloped viruses
128. Some human viruses are difficult to study because
