Question

the following model represents the elongation stage of protein translation.
which arrow represents a trna leaving the ribosome after transferring an amino acid to a growing polypeptide chain?
choose 1 answer:
a arrow 1
b arrow 2
c arrow 3
d arrow 4

Explanation:

In the elongation stage of protein translation, after a tRNA transfers its amino acid to the growing polypeptide chain, it exits the ribosome from the E (exit) site. Arrow 1 shows a tRNA leaving the ribosome after transferring the amino acid. Arrow 2 is likely for a new tRNA entering with an amino acid, Arrow 3 for peptide bond formation, and Arrow 4 for tRNA moving to the P site or another step. So the correct arrow is Arrow 1.

Answer:

A. Arrow 1