Botany Choose the correct statement with respect to DNA replication.                                                                                                                      

 Choose the correct statement with respect to DNA replication.                                                                                                                      

  1. A

    DNA replication is randomly initiated at any place.

  2. B

    Deoxyribonucleoside triphosphates act not only as substrates but also as source of energy during DNA replication.

  3. C

    The replication is continuous on both the strands of DNA.

  4. D

    The replication is discontinuous on both the strands of DNA.

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    Solution:

    Deoxyribonucleoside triphosphates act as substrates as well as energy sources for polymerisation reaction.

    Replication is initiated at specific sites of DNA known as origin of replication.

    On one strand with 3' to 5' polarity the formation of new strand is continuous and in the other strand with 5' to 3' polarity the replication is discontinuous. The discontinuously formed DNA fragments are later joined by DNA ligase.

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