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IF1 helps in correct placement of the initiation tRNA. How does it do so?

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IF1 helps in correct placement of the initiation tRNA. How does it do so?

(a) By guiding it to P site

(b) By binding to A site

(c) By dissociating the ribosomal complex

(d) By binding to the P site

I got this question in an international level competition.

My question is from Initiation topic in chapter Gene Expression : Translation of Cytogenetics

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Correct choice is (b) By binding to A site

Easy explanation: IF1 binds to the A site of the 30S subunit so that the 1^st aminoacyl-tRNA can’t sit at the A site. It then sits on the P site i.e. correct position.

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