Biology - Molecular Basis of Inheritance Question with Solution | TestHub
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 thecorrectanswer from the options given below:
Options:
Answer:
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 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 in the activation of nucleotides by adding phosphate groups to nucleoside monophosphates to form nucleoside triphosphates.
Thus, the correct matching is (A) - (III), (B) - (IV), (C) - (I), (D) - (II).
Answer: (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
