MHT CET Medical202621 April 2026Morning ShiftBiologyMolecular Basis of InheritanceActual
Match List I with List II List I (Enzymes involved in DNA replication) List II (Function.) (A) Helicase (I) Forms double helix to form daughter DNA molecules. (B) DNA polymerase (II) Activation of nucleotides. (C) DNA gyrase (III) Unwinding of DNA. (D) Phosphorylase (IV) Removal of RNA primers. Choose the correct answer from the options given below:
Options
- A(A) - (I), (B) - (II), (C) - (III), (D) - (IV)
- B(A) - (II), (B) - (IV), (C) - (I), (D) - (III)
- C(A) - (I), (B) - (II), (C) - (IV), (D) - (III)
- D(A) - (III), (B) - (IV), (C) - (I), (D) - (II)
Correct answer
D. (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
Step-by-step solution
Helicase is responsible for the unwinding of the DNA double helix by breaking the hydrogen bonds between the complementary nitrogenous bases. DNA polymerase (specifically DNA polymerase I) has 5' 3' exonuclease activity, which is responsible for the removal of RNA primers during DNA replication. DNA gyrase (a type of topoisomerase) relieves the torsional strain generated during unwinding and introduces negative supercoils, which helps in forming the double helix of daughter DNA molecules. Phosphorylase is involved