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Biology · 2023 · 1 mark
CBSE 2023 · Region 3 · Set 3 · Q14
Assertion (A): For DNA sequencing, the total DNA from a cell is isolated and converted into random fragments of relatively smaller sizes. Reason (R):…
Assertion (A) : For DNA sequencing, the total DNA from a cell is isolated and converted into random fragments of relatively smaller sizes.
Reason (R) : Human genome is said to have approximately $\displaystyle 3 \times 10^{9} \mathrm{bp}$ and the total estimated cost for sequencing is very high.
Official answer
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not 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.