NEET Biology Chapter-wise Weightage 2025 (Important Topics & No of Questions)

Preparing for NEET 2025? By using the NEET 2025 Biology Chapterwise Weightage, you can ace Biology with an optimal strategy!

NEET Exam 2025 Overview

1. For students applying to medical colleges in India, the National Testing Agency (NTA) introduced the National Eligibility cum Entrance Test (NEET).
2. The NEET-UG exam consists of three subjects: Physics, Chemistry, and Biology.
3. The tentative date for NEET-UG 2025 is May 4, 2025.

Before diving into the NEET 2025 Biology Chapterwise Weightage, you must refer to the NEET-UG 2025 Syllabus for a clear understanding of the chapters.

NEET 2025 Chapterwise Weightage for Biology

From the following NEET Biology Chapterwise Weightage 2025, we can observe that chapters like Molecular Basis of Inheritance, Principles of Inheritance and Variation, Sexual Reproduction in Flowering Plants, Cell: The Unit of Life, etc. hold a high weightage.

NEET 2025 Biology Important Topics

For better understanding of the Biology Chapterwise Weightage in NEET, it can be split into two major sections: Botany and Zoology.

Below is a section-wise breakdown of the NEET Biology Chapterwise Weightage.

NEET Botany Chapterwise Weightage and Important Topics

Historically in Botany, most of the questions were concept-based and diagram-based. 

The Chapterwise Weightage of each chapter and their important topics that frequently appear are as follows:

1. The Living World (0.75%)

• Characteristics of Living Organisms
• Taxonomy and Nomenclature

2. Biological Classification (3.33%)

• Five-Kingdom Classification
• Lichens and Viruses

3. Plant Kingdom (3.75%)

• Algae, Bryophytes, Pteridophytes, Gymnosperms, and Angiosperms
• Alternation of Generations

4. Morphology of Flowering Plants (4.17%)

• Flower Structure
• Modifications of Roots, Stems, and Leaves

5. Anatomy of Flowering Plants (3.5%)

• Secondary Growth
• Anatomy of Dicotyledonous and Monocotyledonous Plants

6. Cell: The Unit of Life (5.17%)

• Cell Organelles
• Prokaryotic Cells
• Eukaryotic Cells

7. Cell Cycle and Cell Division (4.5%)

• Meiosis
• Cell Cycle

8. Photosynthesis in Higher Plants (2.58%)

• The Electron Transport
• The C4 Pathway
• Photorespiration
• Pigments in Photosynthesis
• Light Reaction

9. Respiration in Plants (1.83%)

• Aerobic Respiration
• Glycolysis
• Fermentation
• Amphibolic Pathway

10. Plant Growth and Development (2.67%)

• Plant Growth Regulators
• Growth 

11. Sexual Reproduction in Plants (5.17%)

• Pre-fertilisation: Structures and Events
• Post-fertilisation: Structures and Events

12. Principles of Inheritance and Variation (6.58%)

• Genetic Disorders
• Mendel’s Laws of Inheritance
• Chromosomal Theory of Inheritance, Linkage, and Recombination

13. Molecular Basis of Inheritance (7.75%)

• Transcription
• The DNA
• Regulation of Gene Expression
• The Search for Genetic Material

14. Microbes in Human Welfare (2.33%)

• Microbes in Industrial Products
• Microbes as Bio Control Agents
• Microbes in Sewage Treatment
• Microbes as Biofertilisers

15. Organisms and Population (3.25%)

• Population Interactions
• Population Attributes
• Population Interactions 

16. Ecosystem (2.17%)

• Energy Flow
• Productivity
• Ecosystem: Structure and Functions
• Decomposition

17. Biodiversity and Conservation (3.33%)

• Biodiversity and Conservation
• Loss of Biodiversity
• Concept of Biodiversity

Zoology Chapterwise Weightage and Important Topics for NEET

Most of the questions that appeared in Zoology were direct recall-based questions that require knowledge of NCERT definitions, examples, and key facts.

The Chapterwise Weightage of each Zoology chapter and their important topics are as follows: 

1. Animal Kingdom (4.33%)

• Basis of Classification
• Important Phyla

2. Structural Organisation in Animals (1.75%)

• Types of Animal Tissues
• Earthworm, Cockroach, and Frog Anatomy

3. Biomolecules (4.08%)

• Enzymes
• Lipids
• Carbohydrates
• Protein

4. Breathing and Exchange of Gases (2.42%)

• Mechanism of Breathing
• Disorders of the Respiratory System
• Transport of Gases

5. Body Fluids and Circulation (3.08%)

• Blood
• Double Circulation
• Circulatory Pathways

6. Excretory Products and Their Elimination (2%)

• Regulation of Kidney Function
• Urine Formation
• Micturition
• Human Excretory System
• Disorders of the Excretory System

7. Locomotion and Movement (2.67%)

• Disorders of Muscular and Skeletal System
• Joints
• Muscles
• Skeletal System and Function

8. Neural Control and Coordination (1.17%)

• Human Neural System
• Neuron: Structural and Functional Unit

9. Chemical Coordination and Integration (3.17%)

• Human Endocrine System
• Hypo and Hyperactivity, and Related Disorders
• Mechanism of Hormone Action

10. Human Reproduction (3.92%)

• Menstrual Cycle
• Fertilisation and Implantation
• Gametogenesis
• Pregnancy and Embryonic Development

11. Reproductive Health (3.42%)

• Population Explosion and Birth Control
• Sexually Transmitted Diseases (STD)
• Infertility and Assisted Reproductive Technologies

12. Evolution (3.92%)

• Evidences of Evolution
• Hardy-Weinberg’s Principle
• Origin and Evolution of Man
• Adaptive Radiation
• Gene Flow and Genetic Drift

13. Human Health and Disease (3.75%)

• Immunity
• Common Diseases in Humans
• Drugs and Alcohol Abuse

14. Biotechnology: Principle and Process (5.08%)

• Tools of Recombinant DNA Technology
• Process of Recombinant DNA Technology

15. Biotechnology: Application (3.5%)

• Biotechnology Applications in Medicine
• Biotechnology Applications in Agriculture
• Ethical Issues

Analysis of the NEET-UG 2024 Biology Question Paper

The difficulty level of the NEET 2024 Biology paper was balanced with questions ranging from easy to tough. The questions were match the following, multiple-choice, and diagram-based.

For a more detailed analysis of the Biology Question Paper of NEET 2024, click here.

Conclusion

To summarise it, studying NEET Biology Chapterwise Weightage can help you understand the important topics and key concepts that are repeated and relevant each year. When it comes to Biology, ensure you understand the diagrams, learn key concepts properly, and maintain an effective study schedule to maximise your NEET scores.

FAQs

1. What is NEET Biology Chapterwise Weightage?

Ans: NEET Biology Chapterwise Weightage allows you to analyse the weightage of each chapter and assess their important sub-topics.

2. How can knowing Chapterwise Weightage benefit my NEET preparation?

Ans: Understanding the NEET Biology Chapterwise Weightage allows you to focus on important topics and form a study plan that aligns with the weightage assigned to each chapter.

3. Which Biology chapters have the highest weightage in NEET?

Ans: Chapters like Molecular Basis of Inheritance, Principles of Inheritance and Variation, Sexual Reproduction in Flowering Plants, Cell: The Unit of Life, etc. hold a high weightage in NEET Biology.

4. Are there chapters with lower weightage that I can afford to skip?

Ans: No, you shouldn't ignore the chapters with lower weightage. While you can focus more on chapters with higher weightage, lower weightage chapters need to be studied as well.

5. How accurate are the weightage percentages provided in various sources?

Ans: We provide reliable weightage percentage based on the information from our NEET-UG 12 Previous Years Solved Papers With Solutions. This book has been created by our panel of experts.

6. How can I effectively use Chapterwise Weightage information in my study plan?

Ans: By using the NEET Chapterwise Weightage, you can streamline your study plan by placing the high weightage chapters over the low weightage chapters.