Mastering Biology Ch. 19

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lysogenic cycle

-the cell reproduces normally -the viral DNA integrates into the chromosome of the host cell

In the lysogenic cycle _____.

viral DNA is replicated along with host DNA

both cycles (lysogenic and lytic)

viral genes are replicated

viruses only

envelope with glycoproteins capsomere (core protein) capsid

What is the function of reverse transcriptase?

it catalyzes the formation of DNA from an RNA template.

Which statements about viruses are true?

-The capsid enters the host cell if the virus is enveloped -A retrovirus contains RNA. -HIV contains reverse transcrpitase -Enveloped viruses bud from the host cell

lytic cycle

-new phages are assembled from viral DNA and proteins -the cell is lysed (broken open) -the host is destroyed

both (viruses and host cell)

protien dna rna

host cell only

ribosome

The genetic material of HIV consists of _____.

single-strande RNA

Double-stranded viral DNA is incorporated into a host cell as a _____.

provirus

glycoprotein

binds to receptor molecules on the host cell membrane

What is the source of a viral envelope?

host cell membrane


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