chapter 19 bio 150 mastering biology || WELL-
ENLIGHTENED!!
The nucleic acid of a virus particle is enclosed in a protein coat. What is it called? correct
answers capsid
What do we call a virus that attacks a bacterium? correct answers Phage
Which of the three types of viruses shown would you expect to include glycoproteins? correct
answers reminder: go to your book and study this
Which of the three types of viruses shown in the figure would you expect to include a
capsid(s)? correct answers reminder: go to your book and study this
what statements supports the argument that viruses are nonliving? correct answers They do
not carry out metabolic processes.
what description correctly identifies the main structural differences between viruses with
envelopes and viruses without envelopes? correct answers Viruses with envelopes have a
phospholipid membrane outside their capsid, whereas viruses without envelopes do not have
a phospholipid membrane.
In the lysogenic cycle _____. correct answers viral DNA is replicated along with host DNA
How does HIV cause disease? correct answers HIV kills cells that defend the body against
disease.
What replicative cycle describes a virus that can integrate its genome into the host cell's
genome? correct answers the lysogenic cycle
What enzyme inserts viral DNA into the host's chromosomal DNA? correct answers
Integrase
How does HIV bind to a host cell? correct answers The viral envelope proteins interact with
CD4 and a co-receptor on the cell membrane.
what event stimulates the production of viral particles in a host cell? correct answers
Activation of the host cell by cytokines, growth factors, or antigens.
True or false? The human immunodeficiency virus (HIV) uses reverse transcriptase to make
double-stranded RNA copies of its DNA genome correct answers false
A retrovirus such as HIV has an RNA genome and uses reverse transcriptase to make double-
stranded DNA copies of the genome, which can then be integrated into the host cell's
genome.
In electron micrographs of HSV infection, it can be seen that the intact virus initially reacts
with cell-surface proteoglycans, then with specific receptors. This is later followed by viral
capsids docking with nuclear pores. Afterward, the capsids go from being full to being
"empty." what statements best fits these observations? correct answers The viral envelope
ENLIGHTENED!!
The nucleic acid of a virus particle is enclosed in a protein coat. What is it called? correct
answers capsid
What do we call a virus that attacks a bacterium? correct answers Phage
Which of the three types of viruses shown would you expect to include glycoproteins? correct
answers reminder: go to your book and study this
Which of the three types of viruses shown in the figure would you expect to include a
capsid(s)? correct answers reminder: go to your book and study this
what statements supports the argument that viruses are nonliving? correct answers They do
not carry out metabolic processes.
what description correctly identifies the main structural differences between viruses with
envelopes and viruses without envelopes? correct answers Viruses with envelopes have a
phospholipid membrane outside their capsid, whereas viruses without envelopes do not have
a phospholipid membrane.
In the lysogenic cycle _____. correct answers viral DNA is replicated along with host DNA
How does HIV cause disease? correct answers HIV kills cells that defend the body against
disease.
What replicative cycle describes a virus that can integrate its genome into the host cell's
genome? correct answers the lysogenic cycle
What enzyme inserts viral DNA into the host's chromosomal DNA? correct answers
Integrase
How does HIV bind to a host cell? correct answers The viral envelope proteins interact with
CD4 and a co-receptor on the cell membrane.
what event stimulates the production of viral particles in a host cell? correct answers
Activation of the host cell by cytokines, growth factors, or antigens.
True or false? The human immunodeficiency virus (HIV) uses reverse transcriptase to make
double-stranded RNA copies of its DNA genome correct answers false
A retrovirus such as HIV has an RNA genome and uses reverse transcriptase to make double-
stranded DNA copies of the genome, which can then be integrated into the host cell's
genome.
In electron micrographs of HSV infection, it can be seen that the intact virus initially reacts
with cell-surface proteoglycans, then with specific receptors. This is later followed by viral
capsids docking with nuclear pores. Afterward, the capsids go from being full to being
"empty." what statements best fits these observations? correct answers The viral envelope
