When a charged tRNA is about to bind to the vacant A site of a ribosome, where is the growing polypeptide?
A)in the A site
B)in the P site
C)in the E site
D)The polypeptide is equally likely to be in any of the three sites.

Question

Quizplus · Accepted Answer

The growing polypeptide is always located in the P site of the ribosome. When a charged tRNA is about to bind to the A site, the P site contains the previous amino acid that has been added to the growing polypeptide chain.

When a Charged TRNA Is About to Bind to the Vacant