Question

The P site of the ribosome A. Is where tRNA molecules that have donated their amino...

The P site of the ribosome

A. Is where tRNA molecules that have donated their amino acids to the growing polypeptide from ribosome

B. is where the tRNA molecule carrying the initiator methionine enters the ribosome

C. none are correct

C. is where tRNA molecules carrying amino acids enter the ribosome

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Answer #1

Ans) The correct answer is "B"

eIF-2-GTP brings the initiator tRNA to the P site of the ribosome in eukaryotes.The initiator tRNA carrying methionine amino acid forms peptide bond with the amino acyl tRNA's amino acid at the A site by the enzyme peptidyl transferase.Once the peptide bond is formed,the methionine is transferred to the amino acyl tRNA's amino acid and the tRNA at the P site moves to the E site and the tRNA at the A site (carrying growing polypeptide chain) moves to the P site so that vacant A site is produced for the next cycle to begin.

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