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Which of the following does not code for an enzyme having both helicase and nuclease activity?

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Which of the following does not code for an enzyme having both helicase and nuclease activity?

(a) Rec-A

(b) Rec-B

(c) Rec-C

(d) Rec-D

The question was asked in an internship interview.

My question comes from DNA Recombination in division DNA, RNA and Protein Metabolism of Biochemistry

1 Answer

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Right answer is (a) Rec-A

Explanation: In E. coli, rec-B, rec-C and rec-D genes encode the Rec-BCD enzyme, which has both helicase and nuclease activities.

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