BIOLOGICAL CLASSIFICATION
VIRUSES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A host
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A term for viral DNA when it has been integrated into the DNA of its host cell’s chromosome
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RNA chromosome from the virus
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A virus
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Detailed explanation-1: -A provirus is a virus genome that is integrated into the DNA of a host cell. In the case of bacterial viruses (bacteriophages), proviruses are often referred to as prophages. However, proviruses are distinctly different from prophages and these terms should not be used interchangeably.
Detailed explanation-2: -Mandatory integration Integration of the viral DNA results in permanent insertion of the viral genome into the host chromosomal DNA, referred as a provirus in the case of retroviruses or prophage in the case of prokaryotic viruses.
Detailed explanation-3: -pro·vi·rus (ˈ)prō-ˈvī-rəs. : a form of a virus that is integrated into the genetic material of a host cell and by replicating with it can be transmitted from one cell generation to the next without causing lysis.
Detailed explanation-4: -A provirus does not directly make new DNA copies of itself while integrated into a host genome in this way. Instead, it is passively replicated along with the host genome and passed on to the original cell’s offspring; all descendants of the infected cell will also bear proviruses in their genomes.