Home/Biology Chapter Weightage

NEET Biology Chapter-wise Weightage10-Year Analysis • 2015–2024 • All 38 Chapters

Know exactly how many questions come from each chapter. Prioritize your NEET 2026 preparation based on real data, not guesswork.

90Questions/Year
38Chapters
10Years Analysed
9High Priority

⚡ Key Insight

Just 9 chapters out of 38 contribute ~35% of all Biology questions. Master these first and you've already secured the bulk of easy marks.

Priority Ranking

Chapters ranked by average questions per year. Focus on High priority chapters first — they appear consistently and carry the most marks.

🔴 HIGH PRIORITY9 chapters • ~27 questions/year

Principles of Inheritance and Variation

Class 12Zoology
4Avg Qs/Year
Practice PYQs →

Molecular Basis of Inheritance

Class 12Zoology
3.4Avg Qs/Year
📈 Trending Up
Practice PYQs →

Animal Kingdom

Class 11Zoology
3Avg Qs/Year
Practice PYQs →

Sexual Reproduction in Flowering Plants

Class 12Botany
3Avg Qs/Year
Practice PYQs →

Human Reproduction

Class 12Zoology
3Avg Qs/Year
Practice PYQs →

Human Health and Diseases

Class 12Zoology
3Avg Qs/Year
Practice PYQs →

Cell: The Unit of Life

Class 11Botany
2.7Avg Qs/Year
📈 Trending Up
Practice PYQs →

Morphology of Flowering Plants

Class 11Botany
2.6Avg Qs/Year
📈 Trending Up
Practice PYQs →

Biomolecules

Class 11Botany
2.6Avg Qs/Year
📈 Trending Up
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🟡 MEDIUM PRIORITY20 chapters • ~40 questions/year

Biotechnology: Principles and Processes

Class 12Botany
2.4Avg Qs/Year
📈 Trending Up
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Neural Control and Coordination

Class 11Zoology
2.3Avg Qs/Year
📈 Trending Up
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Plant Kingdom

Class 11Botany
2.2Avg Qs/Year
Practice PYQs →

Chemical Coordination and Integration

Class 11Zoology
2.2Avg Qs/Year
Practice PYQs →

Biological Classification

Class 11Botany
2Avg Qs/Year
Practice PYQs →

Anatomy of Flowering Plants

Class 11Botany
2Avg Qs/Year
Practice PYQs →

Cell Cycle and Cell Division

Class 11Botany
2Avg Qs/Year
Practice PYQs →

Photosynthesis in Higher Plants

Class 11Botany
2Avg Qs/Year
Practice PYQs →

Digestion and Absorption

Class 11Zoology
2Avg Qs/Year
Practice PYQs →

Body Fluids and Circulation

Class 11Zoology
2Avg Qs/Year
Practice PYQs →

Locomotion and Movement

Class 11Zoology
2Avg Qs/Year
Practice PYQs →

Evolution

Class 12Zoology
2Avg Qs/Year
Practice PYQs →

Microbes in Human Welfare

Class 12Botany
2Avg Qs/Year
Practice PYQs →

Organisms and Populations

Class 12Botany
2Avg Qs/Year
Practice PYQs →

Ecosystems

Class 12Botany
2Avg Qs/Year
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Biodiversity and Conservation

Class 12Botany
2Avg Qs/Year
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Environmental Issues

Class 12Botany
2Avg Qs/Year
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Breathing and Exchange of Gases

Class 11Zoology
1.6Avg Qs/Year
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Excretory Products and Their Elimination

Class 11Zoology
1.6Avg Qs/Year
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Reproductive Health

Class 12Zoology
1.6Avg Qs/Year
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🟢 LOW PRIORITY9 chapters • ~11 questions/year

Structural Organisation in Animals

Class 111.5 Avg Qs
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Plant Growth and Development

Class 111.5 Avg Qs
Practice PYQs →

Strategies for Enhancement in Food Production

Class 121.5 Avg Qs
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Biotechnology and Its Applications

Class 121.5 Avg Qs
Practice PYQs →

Transport in Plants

Class 111.2 Avg Qs
Practice PYQs →

Respiration in Plants

Class 111.1 Avg Qs
Practice PYQs →

The Living World

Class 111 Avg Qs
Practice PYQs →

Mineral Nutrition

Class 111 Avg Qs
Practice PYQs →

Reproduction in Organisms

Class 121 Avg Qs
Practice PYQs →

Year-wise Question Distribution

Number of questions from each chapter in every NEET exam from 2015 to 2024. Scroll horizontally to see all years.

ChapterClass15161718192021222324AvgPriority
Principles of Inheritance and Variation1244444444444High
Molecular Basis of Inheritance1233433434343.4High
Animal Kingdom1133333333333High
Sexual Reproduction in Flowering Plants1233333333333High
Human Reproduction1233333333333High
Human Health and Diseases1233333333333High
Cell: The Unit of Life1132323323332.7High
Morphology of Flowering Plants1123232323332.6High
Biomolecules1122323233332.6High
Biotechnology: Principles and Processes1222232323232.4Medium
Neural Control and Coordination1122223223232.3Medium
Plant Kingdom1122322223222.2Medium
Chemical Coordination and Integration1122222322322.2Medium
Biological Classification1122222222222Medium
Anatomy of Flowering Plants1122222222222Medium
Cell Cycle and Cell Division1122222222222Medium
Photosynthesis in Higher Plants1122222222222Medium
Digestion and Absorption1122222222222Medium
Body Fluids and Circulation1122222222222Medium
Locomotion and Movement1122222222222Medium
Evolution1222222222222Medium
Microbes in Human Welfare1222222222222Medium
Organisms and Populations1222222222222Medium
Ecosystems1222222222222Medium
Biodiversity and Conservation1222222222222Medium
Environmental Issues1222222222222Medium
Breathing and Exchange of Gases1121212212121.6Medium
Excretory Products and Their Elimination1121221212211.6Medium
Reproductive Health1222121221211.6Medium
Structural Organisation in Animals1121212121121.5Low
Plant Growth and Development1112121212211.5Low
Strategies for Enhancement in Food Production1221212121211.5Low
Biotechnology and Its Applications1221212211211.5Low
Transport in Plants1111112111211.2Low
Respiration in Plants1111111111121.1Low
The Living World1111111111111Low
Mineral Nutrition1111111111111Low
Reproduction in Organisms1211111111111Low

Unit-wise Weightage

How questions are distributed across NCERT units. Genetics & Evolution and Ecology are the heaviest units in Class 12.

Human Physiology

17%

~13.7 questions/year • 7 chapters

Genetics and Evolution

12%

~9.4 questions/year • 3 chapters

Reproduction

11%

~8.6 questions/year • 4 chapters

Diversity in Living World

10%

~8.2 questions/year • 4 chapters

Ecology

10%

~8 questions/year • 4 chapters

Cell Structure and Function

9%

~7.3 questions/year • 3 chapters

Plant Physiology

9%

~6.8 questions/year • 5 chapters

Biology and Human Welfare

8%

~6.5 questions/year • 3 chapters

Structural Organisation

8%

~6.1 questions/year • 3 chapters

Biotechnology

5%

~3.9 questions/year • 2 chapters

Class 11 vs Class 12 Split

Class 11~42 Qs54%
22 chapters
Class 12~36 Qs46%
16 chapters

📈 Chapters with Increasing Trend

These chapters have been getting more questions in recent years. Pay extra attention to these for NEET 2026.

Morphology of Flowering Plants

Class 11Botany • Avg 2.6 Qs/year

20
21
22
23
24
Practice PYQs →

Cell: The Unit of Life

Class 11Botany • Avg 2.7 Qs/year

20
21
22
23
24
Practice PYQs →

Biomolecules

Class 11Botany • Avg 2.6 Qs/year

20
21
22
23
24
Practice PYQs →

Neural Control and Coordination

Class 11Zoology • Avg 2.3 Qs/year

20
21
22
23
24
Practice PYQs →

Molecular Basis of Inheritance

Class 12Zoology • Avg 3.4 Qs/year

20
21
22
23
24
Practice PYQs →

Biotechnology: Principles and Processes

Class 12Botany • Avg 2.4 Qs/year

20
21
22
23
24
Practice PYQs →

Start Practicing with 10,000+ NEET Questions

Now that you know which chapters matter most, practice with chapter-wise questions designed to match the exact NEET pattern.

How to Use NEET Biology Chapter Weightage for Smart Preparation

Understanding the chapter-wise weightage of NEET Biology is one of the most effective ways to plan your preparation strategy. NEET Biology consists of 90 questions worth 360 marks, split equally between Botany (45 questions) and Zoology (45 questions). However, not all 38 chapters are equally important.

Our analysis of 10 years of NEET papers (2015–2024) reveals that chapters like Principles of Inheritance and Variation, Molecular Basis of Inheritance, Human Reproduction, Animal Kingdom, and Sexual Reproduction in Flowering Plants consistently carry the highest weightage — averaging 3–4 questions every year. Together, the top 8 high-priority chapters account for roughly one-third of all Biology questions.

The smartest strategy is to master high-priority chapters first, ensuring you can confidently answer 25+ questions. Then move to medium-priority chapters for another 40+ questions. Low-priority chapters should be covered last — they're important for a perfect score but less critical for competitive marks.

A key trend to watch: chapters like Biomolecules, Cell: The Unit of Life, Molecular Basis of Inheritance, and Biotechnology: Principles and Processes have shown an increasing trend in recent years. NEET 2025 also shifted toward longer, multi-statement questions that combine facts from multiple sections within a chapter — making deep understanding more important than rote memorization.

Preparation Strategy Based on Weightage

Phase 1 (First 4-6 weeks): Complete all high-priority chapters thoroughly. Focus on NCERT line-by-line reading, diagrams, and practice with previous year questions from these chapters.

Phase 2 (Next 4-6 weeks): Cover all medium-priority chapters. These form the bulk of your score. Practice with chapter-wise MCQs to build speed.

Phase 3 (Final 2-3 weeks): Revise low-priority chapters. These are usually straightforward factual questions — quick revision of key points is sufficient.

Use the MedicNEET app to practice chapter-wise with 10,000+ questions that match the exact NEET pattern, including the new long-question format introduced in NEET 2025.