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Mastering Biology Ch. 19 Questions and Answers 100% Solved
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Mastering Biology Ch. 19
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Mastering Biology Ch. 19Which statements about viruses are true? - answer-The capsid enters the host cell if the
virus is enveloped
-A retrovirus contains RNA.
-HIV contains reverse transcriptase
-Enveloped viruses bud from the host cell
In the lysogenic cycle _____. - answer viral DNA is replicated along with host DNA
The genetic material of HIV consists of _____. – answer single-stranded RNA
What is the function of reverse transcriptase? - answer it catalyzes the formation of
DNA from an RNA template.
What is the source of a viral envelope? - answer host cell membrane
Double-stranded viral DNA is incorporated into a host cell as a _____. - answer provirus
viruses only - answer envelope with glycoproteins
capsomere (core protein)
capsid
host cell only - answer ribosome
both (viruses and host cell) – answer protein
dna
rna
lytic cycle - answer-new phages are assembled from viral DNA and proteins
-the cell is lysed (broken open)
-the host is destroyed
lysogenic cycle - answer-the cell reproduces normally
-the viral DNA integrates into the chromosome of the host cell
both cycles (lysogenic and lytic) - answer viral genes are replicated
glycoprotein - answer binds to receptor molecules on the host cell membrane
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