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Q.

Find the correct statements from the following w.r.t DNA replication

 (I) DNA replication is initiated at a region called origin of replication.

 (II) In E.coli the rate of average polymerization is 2000 bp per second.

 (III) Deoxyribonucleotide triphosphates act as substrates and also provide energy.

 (IV) The main enzyme is DNA dependent DNA polymerase   

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a

I, II and III

b

I, II, III and IV

c

I, II and IV

d

I, III and IV

answer is C.

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Detailed Solution

Deoxyribonucleoside triphosphates act as substrates and also are sources of energy for polymerization reaction (the two terminal phosphates in a deoxynucleoside triphosphates are high-energy phosphates, the same as in the case of ATP).

 

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