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Features of Codon

Identify the ...

Question

Identify the triplet codons which code for amino acids serine and proline.
(a) UCC (b) CCA (c) GGG (d) AAG.
The correct answer is

A

a and c

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B

b and d

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C

c and d

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D

a and b

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Solution

The correct option is D a and b
Amino acid serine is encoded by UCU, UCC, UCA and UCG; proline is encoded by CCU, CCC, CCA and CCG. Among the given options, serine and proline is encoded by UCC (a) and CCA (b) respectively. Correct answer is D. Codons GGG and AAG code for glycine and lysine respectively.

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Similar questions

Q. Match the following.

	Codons	Amino acids
A	UUU	I Serine
B	GGG	II Methionine
C	UCU	III Phenylalanin
D	CCC	IV Glycine
E	AUG	V Proline

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

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

A) UUU	1) Serine
B) GGG	2) Methionine
C) UCU	3) Phenylalanine
D) CCC	4) Glycine
E) AUG	5) Proline

Q. Choose the correct answer from the alternatives given :
Direction : Read the sequence of nucleotides in the given segment of mRNA and the respective amino acid sequence in the polypeptide chain to answer the Q. nos. 65 and 66.
mRNA

A U G U U U A U G C C U G U U U C U U A A \to

Polypeptide Met-Phe-Met-Pro-Val-Ser
Which codons respectively code for proline and valine amino acids in the given polypeptide chain, respectively?

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.

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