Question

question 5
put the following events of elongation in prokaryotic translation in chronological order.

1. binding of mrna with small ribosomal subunit
2. recognition of initiation codon
3. complementary base pairing between initiator codon and anticodon of initiator trna
4. base pairing of the mrna codon following the initiator codon with its complementary trna
5. attachment of the large subunit

a 1,2,3,4,5
b 2,1,4,3,5
c 5,4,3,2,1
d 1,2,3,5,4

Explanation:

• First, mRNA binds with the small ribosomal subunit (1).
• Then, the initiation codon is recognized (2).
• Next, complementary base - pairing occurs between the initiator codon and the anticodon of the initiator tRNA (3).
• After that, the large subunit attaches (5).
• Finally, base - pairing of the mRNA codon following the initiator codon with its complementary tRNA takes place (4).

Answer:

D. 1, 2, 3, 5, 4