Question

Arrange the following events in the order of synthesis of a protein

i) A peptide bond forms
ii) A tRNA matches its anticodon to the codon in the A- site
iii) The movement of second tRNA complex from A-site to P-site
iv) The large subunit attaches to the small subunit and the initiator tRNA fits in the P-site
v) A small subunit binds to the mRNA
vi) The activated amino acid tRNA complex attaches the initiation codon on mRNA

A. iv, v, iii, ii, i, vi
B. iv, vi, v, ii, I, iii
C. v, iv, iii, ii, vi, i
D. v, vi, iv, ii, i, iii

Answer 1

The correct sequence of events in the synthesis of a protein is: a small subunit binds to mRNA, the activated amino acid tRNA complex attaches to the start codon, the large subunit attaches, tRNA matches its anticodon, a peptide bond forms, and the tRNA moves from A-site to P-site. The sequence is D: v, vi, iv, ii, i, iii.

Step-by-step explanation:

The correct order of the events in the synthesis of a protein are:

1. A small subunit binds to the mRNA.
2. The activated amino acid tRNA complex attaches the initiation codon on mRNA.
3. The large subunit attaches to the small subunit and the initiator tRNA fits in the P-site.
4. A tRNA matches its anticodon to the codon in the A-site.
5. A peptide bond forms.
6. The movement of second tRNA complex from A-site to P-site.

Therefore, the correct sequence is D: v, vi, iv, ii, i, iii. This sequence represents the process from the initiation of translation where the small ribosomal subunit binds to the mRNA, through to the elongation phase where peptide bonds are formed and tRNAs move from the A-site to the P-site within the ribosome.