First slide

Replication

Question

During replication of DNA, deoxyribonucleoside triphosphates serve dual purposes because

Easy

A

they act as helicase and a substrates
B

they act as a substrates and provide energy for polymerisation.
C

they act as primase and provide energy for polymerization.
D

they act as a substrate and help in releasing tension developed in DNA due to unwinding of DNA

Solution

Deoxyribonucleoside triphosphates serve dual purposes. In addition to acting as substrates, they provide energy for polymerisation reaction (the two terminal phosphates in a deoxynucleoside triphosphates are high-energy phosphates, same as in case of ATP).

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