Question

Match the enzymes with their functions in DNA replication:

List I	List II
A. Topoisomerase --- III. Helps to relieve the twisting strain ahead of the replication fork B. Helicases --- I. Unwinds the double helix at the replication fork, separating the parental strands C. DNA polymerase --- IV. Catalyzes the synthesis of new DNA by adding nucleotides D. DNA ligase --- II. Joining the sugar phosphate backbones of all the Okazaki fragments	III. Helps to relieve the twisting strain ahead of the replication fork I. Unwinds the double helix at the replication fork, separating the parental strands IV. Catalyzes the synthesis of new DNA by adding nucleotides II. Joining the sugar phosphate backbones of all the Okazaki fragments

• A. A-II, B-IV, C-III, D-I
• B. A-III, B-I, C-IV, D-II
• C. A-II, B-IV, C-I, D-III
• D. A-II, B-I, C-III, D-IV

Hint:

Topoisomerase relieves strain; Helicase unwinds; DNA polymerase synthesises; DNA ligase joins fragments.

Answer 1

The Correct Option is B