NEET Botany Chapter Weightage & Important Topics 2027
Every chapter ranked by how many questions it contributed across 4 past NEET Paper-1 shift papers (2022–2025), with the expected number of questions in a 45-question Botany section. Focus your prep top-down.
Chapter-wise weightage
| # | Chapter | Expected in paper | Weightage |
|---|---|---|---|
| 1 | Molecular Basis of Inheritance | ~4.0 | ★★★★★ |
| 2 | Biotechnology: Principles and Processes | ~3.5 | ★★★★☆ |
| 3 | Morphology of Flowering Plants | ~3.2 | ★★★★☆ |
| 4 | Principles of Inheritance and Variation | ~3.0 | ★★★☆☆ |
| 5 | Anatomy of Flowering Plants | ~2.7 | ★★★☆☆ |
| 6 | Sexual Reproduction in Flowering Plants | ~2.5 | ★★★☆☆ |
| 7 | Biodiversity and Conservation | ~2.5 | ★★★☆☆ |
| 8 | Photosynthesis in Higher Plants | ~2.5 | ★★★☆☆ |
| 9 | Biomolecules | ~2.2 | ★★★☆☆ |
| 10 | Plant Kingdom | ~2.2 | ★★★☆☆ |
| 11 | Plant Growth and Development | ~2.2 | ★★★☆☆ |
| 12 | Respiration in Plants | ~2.0 | ★★☆☆☆ |
| 13 | Cell: The Unit of Life | ~1.7 | ★★☆☆☆ |
| 14 | Cell Cycle and Cell Division | ~2.0 | ★★☆☆☆ |
| 15 | Organisms and Populations | ~1.7 | ★★☆☆☆ |
| 16 | Ecosystem | ~1.5 | ★★☆☆☆ |
| 17 | Microbes in Human Welfare | ~1.2 | ★★☆☆☆ |
| 18 | Biological Classification | ~0.7 | ★☆☆☆☆ |
| 19 | Biotechnology and its Applications | ~0.7 | ★☆☆☆☆ |
| 20 | Structural Organisation in Animals | ~0.5 | ★☆☆☆☆ |
| 21 | Human Reproduction | ~0.5 | ★☆☆☆☆ |
| 22 | Human Health and Disease | ~0.5 | ★☆☆☆☆ |
| 23 | Reproductive Health | ~0.2 | ★☆☆☆☆ |
| 24 | The Living World | ~0.2 | ★☆☆☆☆ |
| 25 | Breathing and Exchange of Gases | ~0.2 | ★☆☆☆☆ |
| 26 | Animal Kingdom | ~0.2 | ★☆☆☆☆ |
| 27 | Body Fluids and Circulation | ~0.2 | ★☆☆☆☆ |
| 28 | Excretory Products and their Elimination | ~0.2 | ★☆☆☆☆ |
Top 20 most-asked topics
| # | Topic | Chapter | Times asked | Importance |
|---|---|---|---|---|
| 1 | Causes of biodiversity loss (The Evil Quartet) | Biodiversity and Conservation | 2× | ★★★★★ |
| 2 | Electron transport system complexes (Complex II = succinate dehydrogenase) | Respiration in Plants | 1× | ★★★☆☆ |
| 3 | PCR amplification (exponential 2n copies) | Biotechnology: Principles and Processes | 1× | ★★★☆☆ |
| 4 | Assisted reproductive technologies (IVF drawbacks) | Reproductive Health | 1× | ★★★☆☆ |
| 5 | Frog circulatory system (venae cavae) | Structural Organisation in Animals | 1× | ★★★☆☆ |
| 6 | Approaches to studying biology (reductionist biology) | The Living World | 1× | ★★★☆☆ |
| 7 | RNA world and DNA as genetic material | Molecular Basis of Inheritance | 1× | ★★★☆☆ |
| 8 | Population interactions (commensalism) | Organisms and Populations | 1× | ★★★☆☆ |
| 9 | Ribosome structure and subunits | Cell: The Unit of Life | 1× | ★★★☆☆ |
| 10 | Ex-situ conservation | Biodiversity and Conservation | 1× | ★★★☆☆ |
| 11 | Ecosystem productivity (GPP/NPP) | Ecosystem | 1× | ★★★☆☆ |
| 12 | Human physiology disorders (emphysema, angina, glomerulonephritis, tetany) | Breathing and Exchange of Gases | 1× | ★★★☆☆ |
| 13 | Abiotic pollination (wind and water) adaptations | Sexual Reproduction in Flowering Plants | 1× | ★★★☆☆ |
| 14 | Microbes in industrial products (fermented beverages) | Microbes in Human Welfare | 1× | ★★★☆☆ |
| 15 | Floral formula symbols (actinomorphic/zygomorphic, ovary position) | Morphology of Flowering Plants | 1× | ★★★☆☆ |
| 16 | Microbial products (streptokinase as clot buster) | Microbes in Human Welfare | 1× | ★★★☆☆ |
| 17 | Human Genome Project findings (gene distribution) | Molecular Basis of Inheritance | 1× | ★★★☆☆ |
| 18 | Frog external morphology (copulatory/nuptial pad) | Structural Organisation in Animals | 1× | ★★★☆☆ |
| 19 | Plant growth regulators (cytokinin, delay of senescence) | Plant Growth and Development | 1× | ★★★☆☆ |
| 20 | Coelom types (pseudocoelomate) | Animal Kingdom | 1× | ★★★☆☆ |
Weightage = recency-weighted question count (recent shifts count for more). "Expected/paper" projects each chapter's share onto a 45-question section — a planning guide, not a guarantee.