Question

Every ribosome has three tRNA binding sites: the A site, the P site, and the E site. For the given sentences, select the correct site from the drop-down menu.
a. The _________site binds the tRNA molecule that is attached to the growing peptide chain.
b. The site that binds the aminoacyl-tRNA is the______ .
c. The _______ site may be bound to deacylated (uncharged) tRNA.
d. The site that binds the peptidyl-tRNA is the_______.

Answer 1

Answer:

A. All sites B. A site C. E site D. P site

Explanation:

A. Because all sites consequently take place while peptide is synthesized.

B. A site (aminoacyl site) is called so because it binds to charged aminoacyl peptide.

C. Because it is the exit site and it takes the final stage on the uncharged molecule.

D. The P site (peptidil site which takes main role in peptide synthesis.

Answer 2

Answer:

a. P

b. A

c. E

d. P

Explanation:

Hello,

Based on the answers and the attached picture describing such process:

A. The P site holds the tRNA carrying the growing polypeptide chain.

B. That is A site and it called aminoacyl-tRNA since it binds to the charged aminoacyl peptide.

C. E site is the exiting site, therefore it turns out being the final stage on the uncharged molecule.

D. At the P site, the peptidyl-tRNA is bind to promote the peptide synthesis.

Best regards.