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Capping and Tailing

Given below i...

Question

Given below is a heterogeneous RNA formed during eukaryotic transcription.

How many introns and exons respectively are formed in this hnRNA?

A

8, 8

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B

7, 7

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C

8, 7

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D

7, 8

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Solution

The correct option is D 7, 8
Splicing is the process of removal of introns and joining of exons in a defined order. During this process, introns appear in the form of loops. In the given figure (I) represents introns and (E) represents exons.

Thus, introns (I) = 7 and exons (E) = 8.

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Similar questions

Q. Assertion: Eukaryotic hnRNA contains introns that are removed during RNA processing
Reason: Splicing of exons suggests the dominance of the RNA world

Q. Assertion :Transcription unit is often monocistronic in eukaryotes and polycistronic in prokaryotes . Reason: Exons do not appear in mature RNA, introns appear in mature RNA.

Q. Assertion (A): In eukaryotes, both introns and exons are transcribed to form hnRNA.

Reason (R): The exons are removed to make the final transcript by splicing.

Q. Statement A: The primary transcript produced in eukaryotes is translated without undergoing any modification or processing.
Statement B: The hnRNA in humans has exons and introns.

Q. Assertion (A): In eukaryotes, both intron and exon are transcribed to form hnRNA
Reason (R) : Splicing is required in prokaryotes

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BIOLOGY

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Capping and Tailing

Standard XII Biology

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