AIIMS 2019 Biology RNA Processing Assertion Reason Question
Assertion : In eukaryotes, both intron and exon are transcribed to form hnRNA Reason : Splicing is required in prokaryotes
Both Assertion and Reason are true, and Reason is the correct explanation for Assertion
Both Assertion and Reason are true, but Reason is not the correct explanation for Assertion
Assertion is true, but Reason is false
Both Assertion and Reason are false
Correct Answer
Detailed Explanation
The assertion is true because in eukaryotes, both introns and exons are transcribed into heterogeneous nuclear RNA (hnRNA), which undergoes splicing to remove introns and join exons. However, the reason is false since splicing occurs in eukaryotes, not prokaryotes, where genes typically lack introns and are transcribed directly into mRNA without the need for splicing. Option A is incorrect because the reason does not explain the assertion, while option B is incorrect because the reason is false. Option D is incorrect as the assertion is true.
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