Question

Match the codons given in column I with their respective amino acids given in column II and choose the correct answer :

	Column I (Codons)		Column II (Amino acids )
(1)	UUU	(i)	Serine
(2)	GGG	(ii)	Methionine
(3)	UCU	(iii)	Phenylalanine
(4)	CCC	(iv)	Glycine
(5)	AUG	(v)	Proline

• A. 1-(iii);2-(i);3-(iv);4-(v);5-(ii)
• B. 1-(ii);2-(iv);3-(i);4-(v);5-(iii)
• C. 1-(iii);2-(iv);3-(v);4-(i);5-(ii)
• D. 1-(iii);2-(iv);3-(i);4-(v);5-(ii)

Answer 1

The correct option is D 1-(iii);2-(iv);3-(i);4-(v);5-(ii)

The genetic codes is a degenerate code that arises from the sequence of mRNA and three bases give rise to a single type of amino acid. As there can be about 64 such combinations of the bases A,U,C and G and there are 20 major amino acids more than one code can represent a single amino acid.

According to the universal genetic code UUU codes for Phenylalanine, GGG codes for Glycine, UCU codes for Serine, CCC codes for Proline and AUG which is also the start codon of translation codes for methionine.

So, the correct option is 'A-(iii), B-(iv),C-(i), D-(v), E-(ii)'.