DNA Structure: Double Helix Model — NEET Biology
🔥 Predicted for NEET 2027📖 NCERT Source
It is made of two polynucleotide chains, where the backbone is constituted by sugar-phosphate, and the bases project inside.
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
The sugar in DNA is:
📖 Solution & NCERT Explanation
View solution & NCERT explanation
Correct answer: B — Deoxyribose
DNA contains deoxyribose, missing one oxygen atom compared to ribose.
❓ Frequently Asked Questions
What does NCERT say about It made two polynucleotide?
It is made of two polynucleotide chains, where the backbone is constituted by sugar-phosphate, and the bases project inside.
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, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180of the ReNEET 2026 paper (all subjects) was already in the MedicNEET question bank
MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.
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