SSC
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Before DNA can be replicated, the DNA must separate ____
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between the phosphate groups
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behind the deoxyribose sugars
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from the sugar-phosphate backbone
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between the nitrogen bases
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Explanation:
Detailed explanation-1: -The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands.
Detailed explanation-2: -Answer and Explanation: The correct answer is option b because DNA must first be unwound by DNA helicase so that it is accessible to DNA replication machinery.
Detailed explanation-3: -Most organisms, including mammals, use bi-directional replication. There are four basic components required to initiate and propagate DNA synthesis. They are: substrates, template, primer and enzymes.
There is 1 question to complete.