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Assertion : An mRNA has both initiation ...

Assertion : An mRNA has both initiation codon and termination codon.
Reason : It specifies only a single polypeptide or number of them.

A

If both the assertion and the reason are true and the reason is a correct explanation of the assertion.

B

If both the assertion and reason are true but the reason is not a correct explanation of the assetion

C

If the assertion is true but the reason is false

D

If the both the assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
b
b) mRNA is a long RNA. It gets attached to ribosome. mRNA has methylated region at the 5 terminus. It functions as a cap for attachment with ribosome. Cap is followed by an initiationi codon (AUG) either immediately or after a small noncoding region. Then there is coding region followed by termination codon (UAA, UAG or UGA). there is then a small noncoding region and poly A area at the 3 terminus, An mRNA may specify only a single polypeptide or a numberof them. the former is called monocistronic while the latter is knonw as polycistronic.
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