Question
Provirus vs. prophage
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Answer
Provirus: integrated viral DNA in eukaryotes; prophage: integrated phage DNA in bacteria.
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Question
Reverse transcriptase
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Answer
Makes cDNA from mRNA; key clue that central dogma is not strictly one-way.
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Question
Prion
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Answer
Infectious misfolded protein with no nucleic acid; protein-only agent.
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Viroid
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Answer
Naked circular ssRNA with no protein coat; encodes no proteins.
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