THE MOLECULAR BASIS OF INHERITANCE
THE GENETICS OF VIRUSES AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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endospore
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host cell
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bacteriophage
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plasmid
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Detailed explanation-1: -Explanation for correct option: Viruses reproduce inside a host cell. Viruses replicate by lysogenic and lytic cycle. In the lytic cycle, the virus attaches itself to the host cell and injects its DNA.
Detailed explanation-2: -A virus needs a living cell in order to reproduce. The living cell in which the virus reproduces is called a host cell.
Detailed explanation-3: -A virus is a tiny, infectious particle that can reproduce only by infecting a host cell. Viruses “commandeer” the host cell and use its resources to make more viruses, basically reprogramming it to become a virus factory. Because they can’t reproduce by themselves (without a host), viruses are not considered living.
Detailed explanation-4: -Replication occurs in the cytoplasm and is largely independent of cellular machinery, as the particles contain many virus-encoded enzymes essential for RNA replication and transcription since these processes (involving copying RNA to make further RNA molecules) do not normally occur in cellular organisms.