Question

Which of these is the first step of translation elongation? a.The mRNA attaches to the small ribosomal subunit. b.The ribosome translocates down the mRNA in the 5' -> 3' direction. c.A peptide bond is formed between the amino acids attached to the tRNAs in the P and A sites. d.The small and large ribosomal subunits combine with mRNA and the tRNA carrying methionine. e.A charged tRNA binds to the A site.

Answer 1

The first step of translation elongation is when a charged tRNA binds to the A site of the ribosome.

Step-by-step explanation:

The first step of translation elongation is when a charged tRNA binds to the A site of the ribosome. Following this, a peptide bond forms between this tRNA and the tRNA in the P site, after which the ribosome translocates, moving the tRNA from the P site to the E site. Thus the correct answer to the question is e. A charged tRNA binds to the A site. This step is vital for the growth of the amino acid chain that will eventually fold into a functional protein.