Question

protein synthesis is performed by an rna - protein complex called the ribosome. as you can see in the image, a ribosome is composed of 3 sites called e, p and a. to which site does trna add its amino acid to the polypeptide chain? a) p b) all answers are correct c) a d) e

Explanation:

In protein synthesis, the A - site (aminoacyl - tRNA site) of the ribosome is where the incoming tRNA adds its amino acid to the growing polypeptide chain. The P - site (peptidyl - tRNA site) holds the tRNA with the growing polypeptide chain, and the E - site (exit site) is where the tRNA exits after it has released its amino acid.

Answer:

C. A