DNA Double Helix Structure & Dimensions — NEET Biology
🔥 Predicted for NEET 2027The 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
Adjacent to a frequently-asked paragraph in the same chapter.
DNA helix is stabilized primarily by:
View solution & NCERT explanation
Correct answer: B — Hydrogen bonding and base stacking
Stability arises from hydrogen bonds and base stacking.
What does NCERT say about two chains are coiled?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.
You just learned this concept. The free app turns it into a daily goal built from your weak topics and brings it back just before you forget it — using active recall and spaced repetition — so it stays till exam day.