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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the leading strand is replicated continuously, while the lagging strand is replicated discontinuously
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the leading strand is replicated discontinuously, while the lagging strand is replicated continuously
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both the leading and lagging strands are replicated continuously
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both the leading and lagging strands are replicated discontinuously
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Detailed explanation-1: -So, the correct answer is ‘DNA replication begins at the promoter’.
Detailed explanation-2: -On the leading strand, DNA synthesis occurs continuously. On the lagging strand, DNA synthesis restarts many times as the helix unwinds, resulting in many short fragments called “Okazaki fragments.” DNA ligase joins the Okazaki fragments together into a single DNA molecule.
Detailed explanation-3: -Which of the following statements correctly describes the difference between the leading and the lagging strands of DNA during DNA replication? The leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction.
Detailed explanation-4: -The correct answer is (D) RNA primase makes the RNA primer, while DNA Pol epsilon extends that primer with DNA. DNA polymerase epsilon is the enzyme that synthesizes new strands of DNA during replication.
Detailed explanation-5: -C-1. New (leading) strand is made continuously, complementary to the top template strand; it grows 5’ to 3’, antiparallel to the template, left to right. New (lagging) strand is made discontinuously, complementary to the bottom template strand.