High weightage chapters for NEET 2026 Biology are Human Physiology, Genetics and Evolution, Ecology & Environment, Reproduction, and plant diversity.
The past years' trends indicate that there are certain Class 11 and Class 12 NCERT Biology topics that are of high weightage and have more questions in the NEET 2026 exam. Key high weightage chapters for NEET 2026 Biology are:
- Human Physiology: 45% of the questions come from this unit.
- Genetics and Evolution: around 24% weightage. Questions come from both Botany and Zoology.
- Ecology and Environment: carries 16% of Biology marks.
- Plant Physiology and Plant Diversity make up more than 25% of Botany questions.
- Reproduction (Plant and Human): questions come from both Botany and Zoology marks.
- Use the NCERT Class 11 and 12 books to cover these topics in detail.
- Practice PYQs and topic-wise mock tests to master these high-weightage areas.
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Key Summary
- There are some chapters like Human Physiology, Genetics and Evolution, Ecology & Environment, Reproduction, and Plant Diversity, which are considered the most important topics for Biology in NEET 2026. These chapters carry the most weightage.
- It is advisable to aim for these topics as they will help increase the marks and improve chances for selection in popular medical universities like AIIMS and JIPMER.
- Human Physiology comprises up to 45% of Biology questions in the NEET 2026 exam.
- Genetics and Evolution, as well as Ecology & Environment, have a significant number of questions and high marks.
- Plant Physiology and Plant Diversity are critical for Botany and contribute a combined average of over 25% to Biology marks.
- Use the latest NCERT books for Class 11 & 12 to cover every concept in these high weightage chapters for NEET 2026 Biology.
- Practice topic-wise mock tests and past years’ papers to strengthen knowledge of high weightage chapters for NEET 2026 Biology.
High Weightage Chapters for NEET 2026 Biology
You can refer to the tables mentioned below to get a compiled overview of High weightage chapters for NEET 2026 biology. There is a chapter name along with the average question, approx weightage is mentioned.
NEET 2026 Biology Chapter-wise Weightage (Compiled Overview)
| Chapter Name | Average Questions | Approx. Weightage (%) | Section |
|---|---|---|---|
| Human Physiology | 13 | 45 | Zoology |
| Genetics and Evolution | 15 | 24 | Botany |
| Ecology & Environment | 10 | 16 | Botany |
| Plant Physiology | 8 | 13 | Botany |
| Plant Diversity | 7 | 12 | Botany |
| Cell Structure & Function | 6 | 10 | Botany |
| Plant Reproduction | 5 | 9 | Botany |
| Animal Kingdom | 3 | 10 | Zoology |
| Human Reproduction & Reproductive Health | 5 | 16–18 | Zoology |
| Molecular Basis of Inheritance | 6 | 10–12 | Botany |
| Structural Organisation in Animals | 2 | 5 | Zoology |
| Biomolecules | 2–3 | 3–4 | Botany |
| Microbes in Human Welfare | 4 | 8 | Botany |
| Biotechnology (All units) | 5 | 10–12 | Both |
| Excretory Products and their Elimination | 1 | 3–5 | Zoology |
| Biology and Human Welfare | 1 | 2 | Zoology |
| Reproductive Health | 2–3 | 5–8 | Zoology |
| Animal Husbandry | 1 | 2–3 | Zoology |
Botany Chapter-wise Weightage NEET 2026
This table gives a list of the Botany chapter-wise weightage for NEET 2026
| Chapter Name | No. of Questions | Weightage (%) |
|---|---|---|
| Plant Diversity | 7 | 12 |
| Plant Anatomy | 2 | 4 |
| Morphology of Flowering Plants | 4 | 7 |
| Cell Structure & Function | 6 | 10 |
| Biomolecules | 2 | 3 |
| Plant Physiology | 8 | 13 |
| Plant Reproduction | 5 | 9 |
| Genetics and Evolution | 15 | 24 |
| Ecology and Environment | 10 | 16 |
| Microbes in Human Welfare | 4 | 8 |
| Principles of Inheritance and Variation | 5 | 10 |
| Molecular Basis of Inheritance | 6 | 12 |
| Biotechnology: Principles and Processes | 3 | 6 |
| Biotechnology: and its Applications | 2 | 4 |
| Photosynthesis in Higher Plants | 2 | 4 |
| Respiration in Plants | 1 | 2 |
| Plant Growth and Development | 2 | 4 |
Zoology Chapter-wise Weightage NEET 2026
This table gives a list of Zoology chapter-wise weightage NEET 2026
| Chapter Name | No. of Questions | Weightage (%) |
|---|---|---|
| Animal Kingdom | 3 | 10 |
| Structural Organization in Animals | 2 | 5 |
| Human Physiology | 13 | 45 |
| Human Reproduction & Reproductive Health | 5 | 16–18 |
| Origin & Evolution | 3 | 10 |
| Animal Husbandry | 1 | 3 |
| Biology and Human Welfare | 1 | 2 |
| Human Health & Diseases | 3 | 9 |
| Evolution | 6 | 10 |
| Biomolecules | 2–3 | 3–4 |
| Excretory Products and their Elimination | 1 | 3–5 |
| Reproductive Health | 2–3 | 5–8 |
| Locomotion and Movement | 1–2 | 6 |
| Body Fluids and Circulation | 1–2 | 5 |
| Neural Control and Coordination | 1 | 2 |
| Chemical Coordination and Integration | 2 | 4 |
NEET 2026 Biology – Most Important Topics (Topic-wise List)
| Topic | Expected Questions | Weightage (%) |
|---|---|---|
| Diversity in Living Organisms | 10 | — |
| Structural Organisation in Plants/Animals | 5 | — |
| Cell: Structure and Function | 7 | — |
| Plant Physiology | 8 | — |
| Human Physiology | 13 | — |
| Reproduction | 10 | — |
| Genetics and Evolution | 18 | — |
| Biology in Human Welfare | 4 | — |
| Biotechnology and Its Applications | 7 | — |
| Ecology and Environment | 10 | — |
Chapter-wise Detailed High weightage chapters for NEET 2026 Biology
Class 11 Botany High weightage chapters for NEET 2026 Biology
| Chapter | No. of Ques | Key Focus Area |
|---|---|---|
| The Living World | 1 | Diversity basics |
| Biological Classification | 2 | Kingdoms, classification, viruses |
| Plant Kingdom | 3 | Bryophytes, Gymnosperms, Angiosperms |
| Morphology of Flowering Plants | 2 | Root, stem, leaf, inflorescence |
| Anatomy of Flowering Plants | 2 | Tissue, anatomy |
| Cell: The Unit of Life | 2 | Prokaryotes vs eukaryotes |
| Cell Cycle and Cell Division | 3 | Stages, regulation, checkpoints |
| Biomolecules | 2 | Proteins, enzymes |
| Photosynthesis in Higher Plants | 2 | Light, dark reactions |
| Respiration in Plants | 1 | Aerobic/anaerobic |
| Plant Growth and Development | 2 | Hormones, growth curves |
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NEET 2026 OverviewClass 12 Botany High weightage chapters for NEET 2026 Biology
| Chapter | No. of Ques | Key Focus Area |
|---|---|---|
| Sexual Reproduction in Flowering Plants | 3 | Pollination, fertilization |
| Principles of Inheritance and Variation | 5 | Mendelian, inheritance patterns |
| Molecular Basis of Inheritance | 6 | DNA structure, replication |
| Microbes in Human Welfare | 4 | Applications, bioremediation |
| Biotechnology: Principles and Processes | 3 | Tools, vectors, PCR |
| Biotechnology: and its Applications | 2 | GM crops, biopiracy |
Class 11 Zoology High weightage chapters for NEET 2026 Biology
| Chapter | No. of Ques | Key Focus Area |
|---|---|---|
| Structural Organisation in Animals | 2 | Tissues, organ systems |
| Animal Kingdom | 3 | Invertebrates, vertebrates |
| Human Physiology (Skeletal/Muscular) | 6 | Digestion, movement, excretion |
| Neural, Chemical Coordination | 1 | Hormones, nerves |
| Breathing & Gas Exchange | 2 | Lungs, oxygen curve |
| Body Fluids and Circulation | 2 | Blood, heart, immunity |
| Excretory Products & Elimination | 1 | Nephron, osmoregulation |
| Locomotion & Movement | 1 | Muscles, joints |
Class 12 Zoology High weightage chapters for NEET 2026 Biology
| Chapter | No. of Ques | Key Focus Area |
| Human Reproduction | 2 | Reproductive system, hormones |
| Reproductive Health | 1 | Contraception, health issues |
| Evolution | 3 | Speciation, adaptation |
| Biology and Human Welfare | 1 | Disease, medicine |
| Human Health and Diseases | 3 | Immunity, pathogens, vaccination |
| Biotechnology (see Botany) | — | Genetics, applications |
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NEET Exam Pattern Changes 2026High weightage chapters for NEET 2026 Biology FAQ:
Ques. What are the important chapters of NEET Biology 2026?
Ans. important chapters include Reproduction, Ecology & Environment, reproduction, and plant diversity
Ques. Which chapter has the highest weightage in NEET Biology?
Ans. Human Physiology, Genetics and Evolution, Ecology & Environment, Reproduction, and plant diversity are high-weightage chapters for NEET Biology 2026
Ques. Is NEET 2026 tough or easy?
Ans. As is well known, NEET is a very competitive exam, and the number of applicants is also higher; it's not possible to decide its ease or difficulty level at present.
Ques. What is the NEET portion for 2026?
The 2026 NEET syllabus is based on the NCERT curriculum for Physics, Chemistry, and Biology (both Botany and Zoology) from Classes 11 and 12.
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