As a ribosome translocates along an mRNA molecule by one codon, which of the following occurs?

A The tRNA that was in the A site moves into the P site.
B The tRNA that was in the P site moves into the A site.
C The tRNA that was in the P site moves to the E site and is released.
D The tRNA that was in the A site departs from the ribosome.
E Both A and C are correct.

Question

As a ribosome translocates along an mRNA molecule by one codon, which of the following occurs?

A    The tRNA that was in the A site moves into the P site.
B    The tRNA that was in the P site moves into the A site.
C   The tRNA that was in the P site moves to the E site and is released.
D   The tRNA that was in the A site departs from the ribosome.
E   Both A and C are correct.

melodydude · Answer

A: tRNA drops an Amino Acid into the A site. 
 

The Peptide bond forms, and the amino acid  moves to the P site and the amino acid goes to the E site where tRNA is Excised from the amino acid and Ejected 

Hopefully this helped.