Question

Assertion : Eukaryotic mRNA requires post transcription processing for formation of functional mRNA.
Reason : Eukaryotic transcripts possess extra non-functional segments called introns.
A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. if both assertion and reason are false.

Answer 1

Correct Answer - a
(a) In eukaryotes ,the monocistronic structural genes have interrupted coding sequences i.e. , the genes in eukaryotes are split. The coding sequences or experssed sequences are defined as exons . They are said to be those sequence that appear in mature or intervening sequences which do not appear in mature or processed RNA. Thus ,post-transcription processing, which involves splicing of introns and fusion of exons, is required to form funcitonal mRNA.