DNA Double Helix Structure & Dimensions — NEET Biology
🔥 Predicted for NEET 2027📖 NCERT Source
The two chains are coiled in a right-handed fashion. The pitch of the helix is 3.4 nm (a nanometre is one billionth of a metre, that is 10⁻⁹ m) and there are roughly 10 bp in each
Why This May Be Tested in NEET 2027
Adjacent to a frequently-asked paragraph in the same chapter.
Practice This Concept
QuestionPredicted for NEET 2027
DNA helix is stabilized primarily by:
📖 Solution & NCERT Explanation
View solution & NCERT explanation
Correct answer: B — Hydrogen bonding and base stacking
Stability arises from hydrogen bonds and base stacking.
❓ Frequently Asked Questions
What does NCERT say about two chains are coiled?
The two chains are coiled in a right-handed fashion. The pitch of the helix is 3.4 nm (a nanometre is one billionth of a metre, that is 10⁻⁹ m) and there are roughly 10 bp in each
Has this concept appeared in NEET?
High probability for NEET 2027. Adjacent to a frequently-asked paragraph in the same chapter.
Which chapter is this from?
Molecular Basis of Inheritance, Class 12 NCERT Biology.
Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90of the NEET 2026 Biology paper matched from the MedicNEET question bank
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