Assertion : In prokaryotes, there are three initiation factors used for protein synthesis.
Reason : All the initiation factors have their own function.

Options

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

Answer

a

Explanation

a) In prokaryotes, three initiation factors are present - `IF_(1)` , `IF_(2)`, `IF_(3)`. All three factors are essential for initation when natural mRNA are used as templates. `IF_(3)` binds to the 30 S ribosomal subunit and is required for its binding to the mRNA starting site. `IF_(3)` also functions as a ribosomes dissociation factors. `IF_(2)` binds the initiator f met -tRNA and carries it to the ribosome (together with GTP) in response to the first AUG codon. `IF_(1)` participates in the interaction between `IF_(2)` and the initiator tRNA.