Question

Assertion: Primary transcript in eukaryotes is much longer than the mature mRNA.

Reason: RNA splicing helps in the removal of introns.

• A. Both assertion and reason are true and the reason is the correct explanation of the assertion
• B. Both assertion and reason are true but the reason is not a correct explanation of the assertion
• C. The assertion is true but the reason is false
• D. Both assertion and reason are false
  

Answer 1

The correct option is A Both assertion and reason are true and the reason is the correct explanation of the assertion

The primary transcript in eukaryotes has introns along with exons, which need to be removed in order to get the coding(exon) regions together. The primary transcript undergoes splicing which is a part of the post-transcription modification. Thus the lenght of the mature mRNA is shorter than the primary transcript.