This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Polypeptide chain termination is enhanced by 
Select and explain. 
A. Stop codon, B. Peptidyl transferase, C. UAA, D. All of these
D: All of these
Answer: D: All of these 
Explanation: Termination requires stop codon (UAA, UAG, UGA) and releasing factors .
Peptidyl transferase is also required which along with releasing factor hydrolyses peptide bond between tRNA at 'P' site and promotes the release of a newly synthesized polypeptide chain from ‘P’ site.