NEET-BIOLOGY (20 MOST IMPORTANT CHAPTERS)

For NEET 2025, Biology carries 50% weightage (360/720 marks), making it the most crucial subject. Here are the top 20 most important chapters, categorized based on previous years’ trends and NCERT relevance:

Class 11 – Botany & Zoology (45% weightage)

1. Diversity of the Living World (Biological Classification, The Living World, Plant & Animal Kingdoms)
2. Cell – The Unit of Life (Cell Structure & Function, Biomolecules, Cell Cycle & Division)
3. Morphology of Flowering Plants
4. Anatomy of Flowering Plants
5. Structural Organization in Animals (Animal Tissues, Frog Anatomy, Cockroach)
6. Transport in Plants
7. Mineral Nutrition (Essential Elements, Nitrogen Metabolism)
8. Photosynthesis in Higher Plants
9. Respiration in Plants
10. Plant Growth and Development (Plant Hormones, Photoperiodism, Vernalization)
11. Digestion and Absorption
12. Breathing and Exchange of Gases
13. Body Fluids and Circulation (Heart, Blood Groups, Lymphatic System)
14. Excretory Products and Their Elimination
15. Locomotion and Movement (Muscles & Joints, Skeletal System)
16. Neural Control and Coordination (Nervous System, Eye & Ear)
17. Chemical Coordination and Integration (Endocrine Glands, Hormones)

Class 12 – Botany & Zoology (55% weightage)

18. Reproduction in Organisms (Modes of Reproduction, Life Cycles)
19. Human Reproduction & Reproductive Health (Gametogenesis, Menstrual Cycle, IVF, Contraception)
20. Molecular Basis of Inheritance (DNA Replication, Transcription, Genetic Code, Translation, Lac Operon)

Additional Must-Read Topics:

• Evolution (Theories, Evidence, Hardy-Weinberg Principle)
• Biotechnology & Its Applications (rDNA Technology, PCR, GM Crops, Bioreactors)
• Human Health & Disease (Immunity, Vaccines, AIDS, Cancer, Drugs & Alcohol Abuse)
• Ecology (Ecosystem, Biodiversity, Environmental Issues, Population Growth)

These chapters contribute ~80% of NEET Biology questions. Master NCERT thoroughly and practice PYQs to maximize your score!