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Biology · 2026 · 1 mark
CBSE 2026 · Region 3 · Set 1 · Q16
Assertion (A): Repetitive sequences are stretches of DNA sequences that are thought to have no direct coding functions. Reason (R): They shed light…
Assertion (A): Repetitive sequences are stretches of DNA sequences that are thought to have no direct coding functions.
Reason (R) : They shed light on chromosome structure, dynamics and evolution.
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 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.