Soru
Which of the following enzymes below plays a role in unzipping the DNA helix and separating them into two identical strands a. topoisomerase b. primase c. Helicase d. ligase
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Usta · 5 yıl öğretmeni
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The correct answer is c. Helicase.Helicase is an enzyme that plays a crucial role in unzipping the DNA helix and separating the two strands. During DNA replication, helicase unwinds the double-stranded DNA molecule, breaking the hydrogen bonds between the base pairs. This unwinding creates a replication fork, allowing other enzymes to access the individual strands and synthesize new complementary strands.Topoisomerase, on the other hand, helps to relieve the tension created by the unwinding of the DNA helix by cutting, unwinding, and rejoining the DNA strands.Primase is an enzyme that synthesizes a short RNA primer, which serves as a starting point for DNA synthesis.Ligase is an enzyme that joins two fragments of DNA together by forming phosphodiester bonds between them.