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15 Cards in this Set

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Why is a virus considered to be nonliving?
A virus doesn't breathe, grow, or develop.
How do retroviruses convert their RNA to DNA?
Viruses use the enzyme "reverse transcriptase" to turn viral RNA into DNA.
In this cycle, the virus's DNA combines with the host cells chromosomes, without killing the host.
lysogenic cycle
virus-like particle, made of only a strand of RNA
viroid
virus-like particle, made of only protein; has no genetic material
prion
viral DNA that has combined with the host cell's chromosome and is replicated each time the host cell replicates.
provirus
living cell in which a virus replicates
host cell
enzyme carried with a retrovirus that helps make viral DNA from RNA
reverse transcriptase
What is the difference between a lytic cycle and a lysogenic cycle?
In the short lytic cycle, the virus immediately replicates and kills the host cell. In the longer, lysogenic cycle, the virus DNA replicates slowly, along with the host's DNA, without killing it.
Describe the state of a herpes virus in a person who had cold sores several years ago
The virus may be in a lysogenic cycle. When the virus goes into a lytic cycle someday the person will get another cold sore.
The outer coat of a virus, made of proteins
capsid
a nonliving particle made of an inner core of nucleic acid surrounded by a capsid
virus
a virus that contains RNA; it uses reverse transcriptase to turn the RNA into DNA.
retrovirus
viruses that infect and destroy bacteria
bacteriophages
In this cycle, the virus immediately takes over the host cell's metabolism and uses it to make new viruses until the cell bursts and dies
lytic cycle