Home Chemistry Biomolecules NEET Previous Year Question The couplings between base units of DNA is t…
Chemistry Biomolecules NEET Previous Year Question Single Correct MCQ
Published on: August 11, 2026

The couplings between base units of DNA is through

A
hydrogen bonding
B
electrostatic bonding
C
covalent bonding
D
van der Waals forces.

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Text Solution

Verified by Experts
The correct answer is:
A

Purines form hydrogen bonds with Pyrimidines (Purines and Pyrimidines are base units); Adenine bonds only to Thymine with two hydrogen bonds; Cytosine bonds only to Guanine with three hydrogen bonds. This arrangement of two nucleotides binding together across the double helix is called a base pair. As hydrogen bonds are not covalent, they can be broken and rejoined relatively easily.

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