2022 Phase 2 Molecular Basis of InheritanceDNA replication Easy Question 1 of 5 in DNA replication

Given below are two statements. Statement I: DNA polymerases catalyses polymerisation only in one direction, that is $5'\rightarrow3'$ Statement II: During replication of DNA, on one strand the replication is continuous while on the other strand it is discontinuous. In the light of the above statements, choose the correct answer from the options given below

A Statement I is incorrect but Statement II is correct
B Both Statement I and Statement II are correct
C Both Statement I and Statement II are incorrect
D Statement I is correct but Statement II is incorrect

The answer is B.

Solution

DNA-dependent DNA polymerase catalyses polymerisation only in the $5'\rightarrow3'$ direction. Hence replication is continuous on the template strand with polarity $3'\rightarrow5'$ and discontinuous on the template strand with polarity $5'\rightarrow3'$. Both statements are correct.

Concept DNA replication

DNA replication in past papers

5 questions from this chapter have appeared across 5 exam years.