A) 50 S ribosome
B) 30 S ribosome
C) 40 S ribosome
D) 60 S ribosome
Correct Answer: A
Solution :
The peptidyl transferase is an aminoacyl transferase as well as the primary enzymatic function of the ribosome, which forms peptide bonds between adjacent amino acids using tRNAs during the translation process of protein biosynthesis. Peptidyl transferase activity is not mediated by any ribosomal proteins, but by ribosomal RNA (iRNA), a ribozyme. In prokaryotes, the 50 S (23 S component) ribosome subunit contains the peptidyl transferase component and acts as a ribozyme. In eukaryotes, the 60S (28S component) ribosome subunit contains the peptidyl transferase component and acts as the ribozyme.
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