Question:
The peptidyl transferase activity of ribosome occurs in:
The peptidyl transferase activity of ribosome occurs in:
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Ribosomal sites:
A-site: aminoacyl-tRNA binding.
P-site: peptidyl-tRNA binding (catalytic site).
E-site: exit site.
A-site: aminoacyl-tRNA binding.
P-site: peptidyl-tRNA binding (catalytic site).
E-site: exit site.
Updated On: Aug 18, 2026
- A-site on the ribosome
- P-Site on the ribosome
- Peptidase transferase activity
- E-site on the ribosome
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Ribosome has three sites for tRNA binding.
Peptidyl transferase activity is located in a specific site.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the ribosomal sites.
Step 3: Detailed Explanation:
The ribosome has A, P, and E sites.
Peptidyl transferase activity occurs in the P-site.
The P-site holds the tRNA with the growing polypeptide chain.
The A-site is for incoming aminoacyl-tRNA.
The E-site is for exiting tRNA.
Thus, peptidyl transferase activity occurs in the P-site.
Step 4: Final Answer:
Peptidyl transferase activity occurs in the P-site.
Hence, the correct option is (B).
Ribosome has three sites for tRNA binding.
Peptidyl transferase activity is located in a specific site.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the ribosomal sites.
Step 3: Detailed Explanation:
The ribosome has A, P, and E sites.
Peptidyl transferase activity occurs in the P-site.
The P-site holds the tRNA with the growing polypeptide chain.
The A-site is for incoming aminoacyl-tRNA.
The E-site is for exiting tRNA.
Thus, peptidyl transferase activity occurs in the P-site.
Step 4: Final Answer:
Peptidyl transferase activity occurs in the P-site.
Hence, the correct option is (B).
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