Biology contributes 360 of 720 marks in NEET UG — making it the single most important subject. A score above 300 in Biology is essential for government MBBS seats. Analysis of the last 10 years of NEET papers reveals consistent patterns in chapter-wise weightage.
Highest Weightage Botany Chapters
- Plant Kingdom (4–5 questions every year) — Classification, alternation of generations, reproductive structures
- Reproductive Biology of Flowering Plants (4–5 questions) — Double fertilisation, endosperm, embryo sac structure
- Molecular Basis of Inheritance (5–6 questions) — DNA replication, transcription, translation, genetic code
- Ecosystem (3–4 questions) — Energy flow, biogeochemical cycles, ecological pyramids
- Biological Classification (3 questions) — Five-kingdom classification, viruses, viroids, lichens
Highest Weightage Zoology Chapters
- Human Physiology (10–12 questions) — Digestion, circulation, breathing, excretion, neural control, locomotion. Highest single topic group in NEET.
- Genetics and Evolution (5–6 questions) — Mendelian genetics, chromosomal disorders, Hardy-Weinberg, Darwin
- Human Reproduction (4–5 questions) — Gametogenesis, fertilisation, implantation, contraception
- Animal Kingdom (3–4 questions) — Phylum-wise characteristics, examples
Revision Strategy
NCERT Biology (Class 11 and 12) is the single most important resource — almost all NEET Biology questions are directly or indirectly from NCERT. Read the text, not just diagrams. Make notes on every bold term. Do at least 3 full revisions of NCERT before the exam.