Question

The difference between a coronavirus and a retrovirus is.... A. A coronavirus is an RNA virus...

  1. The difference between a coronavirus and a retrovirus is....

    A. A coronavirus is an RNA virus and a retrovirus is a DNA virus

    B. A coronavirus is a DNA virus and a retrovirus is an RNA virus

    C. A coronavirus copies itself into DNA and integrates into the host genome while the retrovirus does not.

    D. A retrovirus copies itself into DNA and integrates into the host genome while the coronavirus does not.
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Answer #1

Answer :

D. A retrovirus copies itself into DNA and integrates into the host genome while the coronavirus does not.

Discussion and explanation :

Retrovirus and Coronavirus both are RNA viruses. Retroviruses like Human immunodeficiency virus have an special enzyme 'reverse transcriptase' which is lacking in Coronavirus. This reverse transcriptase allows for conversion of RNA to DNA, this resulting DNA is incorporated into host cell genome.This integrated DNA after transcription produces viral RNA and can code for viral proteins and thus assembly of new virus particles.

Coronavirus lack reverse transcriptase, so DNA formation from RNA is not possible in them and hence there is no incorporation of any DNA into host cell genome.

So, answer is 'D'.

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