Consider the following statements and choose the correct option.
(a) Six codons do not code for any amino-acid.
(b) Codon is read in m-RNA in a contiguous fashion.
(c) Three codons function as stop codons.
(d) The initiator codon AUG codes for methionine.

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(a), (b) and (d) are wrong

(b), (c)and(d) are wrong

(a) is wrong

(a), (b) and (c) are wrong

answer is D.

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Detailed Solution

Only A is wrong but B, C, D are correct.
A. Leucine is an amino acid that has 6 codons, which include UUA, UUG, CUU, CUC, CUA, CUG.
B. Codons in mRNA are read in a contiguous or sequential fashion, with each codon representing a specific
Amino acid or a start/stop signal.
C. Three codons do not code for any amino acid. UAG, UGA and UAA are the stop codons, and they do not code for any amino acid.
D. The initiator codon, AUG, codes for the amino acid methionine in most cases.

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