Select the incorrect statement regarding DNA replication.

Options

A. Leading strand is formed in `5'to3'` direction
B. Okazaki fragments are formed in `5'to3'` direction
C. DNA polymerase catalyses polymerisation in `5' to 3'` direction
D. DNA polymerase catalyses polymerisation in `3' to 5'` direction

Answer

D

Explanation

(d) : Synthesis of DNA by DNA polymerases occurs only in `5' rarr 3'` direction. One strand called leading strand , is copied in the same direction as the unwinding helix. The other strand is known as lagging strand. Replication of lagging strand is in a dicontinuous way , and in the direction of growth of lagging stand is `3' rarr 5'` though in short segments of DNA which are always in the `5' rarr 3'` direction. These short segments are called Okazaki fragments joined together by the action od DNA ligase.