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The enzyme responsible for breaking the hydrogen bonds, and thus separating the DNA strands during DNA synthesis is

  • A.DNA polymerase
  • B.strandase
  • C.helicase
  • D.none of these

Answer: C

Correct answer: helicase

Helicase breaks the hydrogen bonds holding the base pairs together and travels along the duplex, separating the strands so each can be copied. It uses ATP, since the base pairs collectively hold the helix firmly. There is no enzyme called “strandase”.

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