The amino acid coded by 3 codons is:-
A) Proline
B) Isoleucine
C) Tryptophan
D) Serine

Q. Identify the triplet codons which code for amino acids serine and proline.

Q. 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

Q. Which of the following group of codons code for amino acid serine?

Q. A segment of DNA, GCCAGGGGATG was translated into the oligopeptide arginine-serine- proline-tyrosine.
(a) What was the base sequence in the mRNA transcribed from the DNA segment?
(b) What are the codons for the 4 amino acids?
(c) If the first adenine in the DNA segment gets substituted by guanine, what will be the
1. mRNA transcript.
2. sequence of amino acids in the new oligopeptide.
3. anticodons on tRNA for the amino acids.

Q. Which of the following codons code for proline.