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Q.

What sequence on the template strand of DNA corresponds to the first amino acid inserted into a protein ?

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a

5' TAC 3'

b

5'CAT 3'

c

5'UAG 3'

d

5' AUG 3'

answer is B.

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Detailed Solution

The first mRNA codon to specify an amino acid is always AUG. A DNA strand with the sequence 3'TAC 5' will corresponds to the first amino acid i.e., AUG. On DNA strand A always pairs with T while on RNA strand A always pairs with U.

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