If the anticodon on tRNA is 5ʹ AUG 3ʹ, then it carries which amino acid and what is its codon on mRNA?

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It carries amino acid histidine and the codon is 5' CAU 3'.

It carries amino acid histidine and the codon is 5' UAC 3'.

It carries amino acid tyrosine and the codon is 5' UAU 3'.

It carries amino acid serine and the codon is 5' UAC 3'.

answer is A.

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Detailed Solution

Codon and anticodon are complementary to each other. The first base of codon pairs with third base of anticodon and the third base pairs with the first base. Hence if the anticodon is AUG, the corresponding codon on mRNA must be CAU which indicates amino acid histidine but not tyrosine.

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