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Nucleotides and Nucleosides

The DNA seque...

Question

The DNA sequences that codes for the polypeptide glutamine, lysine, histidine is

A

CAG AAA CAU

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B

ACT CCC ACG

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C

GUC UUU GUA

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D

GTC TTT GTA

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E

None of the above

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Solution

The correct option is D GTC TTT GTA
Amino acid glutamine is encoded by CAA and CAG, lysine is encoded by AAA and AAG while histidine is encoded by CAU and CAC. The mRNA sequence for given polypeptide should be "CAA/CAG-AAA /AAG - CAU/CAC". The complementary DNA sequence is "GTT/GTC-TTT/TTC-GTA/GTG".
So, the correct answer is option D.

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