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Biology · 2023 · 1 mark
CBSE 2023 · Region 3 · Set 3 · Q13
Assertion (A): The Covid-19 virus has a shorter life-span and evolves into new strains at a fast speed. Reason (R): RNA being unstable, mutates at a…
Assertion (A) : The Covid-$\displaystyle 19$ virus has a shorter life-span and evolves into new strains at a fast speed.
Reason (R) : RNA being unstable, mutates at a faster rate.
Official answer
(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
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CBSE Class 12 Biology past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.