Question

The enzyme peptidyl transferase of prokaryotes resides in

• A. 50S ribosome
• B. 30S ribosome
• C. 40S ribosome
• D. 60S ribosome

Answer 1

The correct option is A 50S ribosome

Peptidyl transferase is the primary enzymatic function of the ribosome, which forms peptide bonds between adjacent amino acids using tRNAs during the translation process of protein biosynthesis.

1) In Prokaryotes, the 50S (23S component) ribosome subunit contains the peptidyl transferase component and acts as a ribozyme.

2) In Eukaryotes, the 60S (28S component) ribosome subunit contains the peptidyl transferase component and acts as the ribozyme.

So, the correct option is A.