Question

Elongation of peptide chain involves all except _________.

• A. mRNA
• B. GTP and peptidyl tranferase
• C. Tu, Ts and G factors
• D. Formyl met-tRNA

Answer 1

The correct option is D Formyl met-tRNA

In translation, when an initiation codon attached with the anticodon it requires GTP. During elongation of the peptide chain, EF-Tu & EF-Ts elongation factor used in prokaryotes when peptide bond forms between the two amino acids with the help of enzymes peptidyl transferase of the large subunit of ribosomes. After the formation of peptide bond ribosomes moves slightly or translocase, it requires factor translocase (EF-G) and energy GTP. Formyl-methionine is initiating tRNA in prokaryotes & non-formyl methionine in eukaryotes.

Thus, the correct answer is option D.