THE MOLECULAR BASIS OF INHERITANCE
DNA REPLICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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There are now two exact copies of the original strand of DNA. Each strand contains half of the original strand.
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Primase marks where to start building the new strand of DNA
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DNA Polymerase starts to attach new nucleotides to the original strand
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There are fragments left on the lagging strand when DNA polymerase is done
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Ligase glues together the fragments on the lagging strand of DNA
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Detailed explanation-1: -6. Replication forks – Due to opening of the DNA strand a replication fork is formed.
Detailed explanation-2: -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-3: -During DNA replication, one new strand (the leading strand) is made as a continuous piece. The other (the lagging strand) is made in small pieces. DNA replication requires other enzymes in addition to DNA polymerase, including DNA primase, DNA helicase, DNA ligase, and topoisomerase.