OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the function of helicase?
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It forms bonds between DNA nucleotides.
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It adds new nucleotides to the DNA helix.
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It forms the DNA helix.
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It separates DNA strands.
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Explanation:
Detailed explanation-1: -DNA helicases are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied. During DNA replication, DNA helicases unwind DNA at positions called origins where synthesis will be initiated.
Detailed explanation-2: -Figure 9.10 A replication fork is formed by the opening of the origin of replication, and helicase separates the DNA strands.
Detailed explanation-3: -An enzyme, known as helicase, is responsible for kickstarting DNA replication, as it breaks the hydrogen bonds holding the double helix together to expose nitrogen bases of each strand, for them to be used as templates to form new DNA.
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