Viruses
Which statements about viruses are true?Select the four statements that are true.
- HIV contains reverse transcriptase.
- Enveloped viruses bud from the host cell.
- The capsid enters the host cell if the virus is enveloped.
- A retrovirus contains RNA.
The pointer is indicating the virus's _____.
genome
Viral DNA makes mRNA by the process of _____.
transcription
The lytic cycle of bacteriophage infection ends with the _____.
rupture of the bacterium
The pointer is indicating the _____.
viral protein coat
As a result of the lytic cycle, _____.
the host cell's DNA is destroyed
In the lysogenic cycle _____.
viral DNA is replicated along with host DNA
Cycle A is the _____ cycle and cycle B is the _____ cycle.
lytic ... lysogenic
The genetic material of HIV consists of _____.
single-stranded RNA
Which of these binds to receptor molecules on the host cell membrane?
A
What is the function of reverse transcriptase?
It catalyzes the formation of DNA from an RNA template.
What is the source of a viral envelope?
host cell membrane
Which of these is reverse transcriptase?
C
Which of these is the viral genome?
E
Double-stranded viral DNA is incorporated into a host cell as a _____.
provirus
How does HIV cause disease?
HIV kills cells that defend the body against disease.
How do enveloped viruses differ from nonenveloped viruses?
They have a membrane-like outer covering.
Which replicative cycle describes a virus that can integrate its genome into the host cell's genome?
Lysogenic
Which enzyme inserts viral DNA into the host's chromosomal DNA?
Integrase
How does HIV bind to a host cell?
The viral envelope proteins interact with CD4 and a co-receptor on the cell membrane.
Which of the following events stimulates the production of viral particles in a host cell?
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
False