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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It is semiconservative
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It occurs during the S-phase of the cell cycle
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It allows daughter cells to have exact copies of the genetic code
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It reduces the chromosome number by half for the production of gametes
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Detailed explanation-1: -DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.
Detailed explanation-2: -So, the correct option is ‘Replication occurs as each base is paired with another exactly like it’.
Detailed explanation-3: -Which of the following statements regarding DNA replication is false? Explanation: The only false statement is that DNA replication of the lagging strand is continuous.
Detailed explanation-4: -Following DNA replication, the DNA content doubles again to 4c, but each pair of sister chromatids is still counted as a single chromosome (a replicated chromosome), so the number of chromosomes remains unchanged at 2n.