Biology is the backbone of NEET. With 90 questions worth 360 marks (out of 720 total), excelling in Biology is the surest way to secure a good NEET rank. And unlike Physics and Chemistry, Biology rewards consistent reading and memorisation — not just conceptual problem-solving.
NEET Biology Syllabus Overview
NEET Biology is divided into Botany and Zoology, each with 45 questions. The syllabus is entirely from NCERT Class 11 and Class 12 Biology textbooks. There are no questions outside NCERT in Biology.
Highest Weightage Chapters in NEET Biology
Class 11 Biology (Botany + Zoology)
- Cell Biology and Cell Division (Mitosis, Meiosis) — 8–10 questions every year
- Plant Kingdom and Animal Kingdom — 5–7 questions
- Biomolecules (Proteins, Enzymes, Nucleic Acids) — 5–6 questions
- Photosynthesis and Respiration — 4–6 questions
- Human Physiology (Digestion, Breathing, Circulation, Excretion) — 10–12 questions
Class 12 Biology (Botany + Zoology)
- Genetics and Molecular Biology (Mendelian Genetics, DNA, Gene Expression) — 15–18 questions
- Reproduction (Flowering Plants + Human Reproduction) — 8–10 questions
- Evolution — 4–5 questions
- Ecology and Environment — 6–8 questions
- Biotechnology — 5–7 questions
- Human Health and Disease — 5–6 questions
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Genetics + Molecular Biology alone can give you 15–18 marks. Master these chapters first — they have the best return on time invested.
How to Study NCERT Biology for NEET
- 1Read the NCERT chapter once for understanding — don't highlight on the first read.
- 2On the second read, highlight only key terms, definitions, and tables.
- 3Write short notes for each chapter covering definitions, cycles, and classification tables.
- 4Draw all NCERT diagrams yourself — NEET frequently asks labelling questions.
- 5Read bold text, tables, and boxed content carefully — NEET loves tricky one-liners from these.
Diagrams You Must Master
- Cell ultrastructure (Plant and Animal cell)
- Mitosis and Meiosis stages
- TS of Dicot and Monocot root, stem, leaf
- DNA double helix structure
- Human heart and blood circulation
- Human digestive system
- Nephron structure
- Female reproductive system + Menstrual cycle
- Life cycle of Plasmodium (malaria parasite)
- Biogeochemical cycles (Nitrogen, Carbon)
Common Mistakes to Avoid
- Relying on reference books instead of NCERT — NEET is 100% NCERT-based for Biology.
- Skipping tables and appendices in NCERT — many questions come from there.
- Memorising without understanding — especially in Genetics, understand the logic before memorising.
- Leaving Botany topics for later — they are equally important as Zoology.
- Not practising previous year questions topic-wise.
"In NEET Biology, the student who has read NCERT the most times wins. There is no shortcut, but it is the most learnable subject in the exam."