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NEET Biology Chapter-Wise Weightage 2025 by NTA: Knowledge of chapter-wise weightage in NEET Biology is important for candidates planning to improve their preparation strategy in the year 2025. NEET is conducted by the National Testing Agency (NTA), and although the official detailed chapter-wise weightage is not given by them, information from credible sources will prove helpful.
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Educational experts' analysis shows that certain chapters hold major weightage in NEET Biology. For example, Genetics and Evolution cover 18% of the questions, i.e., 8-9 questions in the exam. Human Physiology is equally important, being responsible for about 13% of the Biology section. Some important chapters are Ecology and Environment with a weightage of 10-16%, and Plant Physiology with 8-13%. Working hard on these high-yield topics will improve one's performance in the exam.
It is important for candidates to use this chapter-wise weightage into their study schedules so that they have an evenly balanced approach covering both high-weightage and core topics. Practice on a regular basis, added with mock tests, can also help in learning and improving time management capabilities, which are important to pass NEET 2025.
NEET biology syllabus is divided into two parts: Zoology and Botany. An in-depth understanding of the NEET biology syllabus is crucial for aspiring medical students, as it forms a significant portion of the overall examination, determining their eligibility for admission to undergraduate medical courses in India. Identifying the weightage of biology chapters in NEET enables aspirants to concentrate their efforts on these specific areas, facilitating a strategic and targeted approach to their studies. The tables below present the chapter wise weightage for NEET Biology subject, providing candidates with valuable insights for a more focused and efficient preparation.
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The table given below gives insights into the weightage of biology chapters in NEET, providing valuable information for aspiring candidates.
The data below shows the NEET 2025 most important chapters in the Biology section from class 11.
Unit | Topic / Chapters | Biology class 11 chapter-wise weightage* |
I | Diversity of Living Organisms | 14% |
II | Structural Organisation in Plants & Animals | 5% |
Structural Organisation in Animals | ||
III | Cell: Structure and Function | 9% |
Cell Cycle and Cell Division | ||
IV | Plant Physiology | 6% |
V | Human Physiology | 20% |
Digestion and Absorption | ||
Chemical Coordination and Integration |
*Approximate weightage; based on previous year exams’ and experts’ analysis.
The Biology chapters from class 12 carry substantial weight in the NEET Exam. Proficiency in mastering the chapter wise weightage for NEET Biology establishes a good base and also increases problem-solving skills. Refer to the table below to learn about the chapters of Biology with the highest biology NEET weightage in class 12.
Based on the previous years' analysis, the table below indicates the weightage of important chapters for the NEET Exam from class 12 Biology.
Unit | Topic / Chapters | Class 12 Biology chapter-wise Weightage* |
VI | Reproduction | 9% |
Human Reproduction | ||
VII | Genetics and Evolution | 18% |
VIII | Biology and Human Welfare | 9% |
Strategies for Enhancement in Food Production | ||
IX | Biotechnology and its Applications | 4% |
X | Ecology and Environment | 6% |
Organisms and Populations | ||
Biodiversity and its Conservation | ||
Environmental Issues |
*Approximate weightage; based on previous year exams’ and experts’ analysis.
In the NEET Biology Syllabus, Zoology and Botany have an equal contribution. The detailed analysis of biology chapter-wise weightage for NEET further reflects the chapters that are more likely to be questioned in Botany. This provides a detailed breakdown to candidates on the chapter wise weightage for NEET biology, helping in their preparation.
The Zoology chapter-wise weightage for NEET 2025 is helpful for aspiring candidates to understand the topic better that they would need to focus more on to perform in the exam.
Topics | No. of Ques. |
Animal Kingdom | 4 |
Cockroach | 2 |
Structural Organisation In Animals (Animal Tissue) | 2 |
Digestion And Absorption (Digestive System) | 2 |
Breathing And Exchange of Gases (respiratory System) | 1 |
Body Fluids And Circulation (Circulatory System) | 2 |
Locomotion And Movement (Muscles, Skeletal System) | 2 |
Neural Control And Co-ordination (Nervous System, Sensory Organs) | 2 |
Chemical Co-ordination and Integration (Endocrine System) | 2 |
Excretory Products And Their Elimination (Excretory System) | 2 |
Human Reproduction | 3 |
Reproductive Health | 3 |
Evolution | 1 |
Human Health and Disease | 3 |
Strategies for Enhancement in Food Production (Animal Breeding) | 1 |
Cell: The Unit of Life | 2 |
Cell Cycle and Cell Division | 2 |
Biomolecules | 1 |
Principles of Inheritance and Variation | 2 |
Molecular Basis of Inheritance | 4 |
Biotechnology Principles and Processes | 1 |
Biotechnology and its Applications | 1 |
Organisms and Populations | 2 |
Environmental Issues | 2 |
Total No. of Questions | 50 |
Understanding the biology chapter-wise weightage for NEET as per the previous year's trends will help them to know the effective way of exam preparation. By making an analysis of the chapter-wise weightage for NEET Biology, the students shall be able to identify the topics that are consistently asked in the exams and on which they should focus during the study sessions. By targeting the high weightage of biology chapters in NEET, students can increase their score improving their overall performance in the exam.
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There will be a total of 90 questions asked from the Biology section of NEET. The total marks for the Biology section is 360 marks.
The NTA (National Testing Agency) releases the official NEET syllabus and weightage details on its website (neet.nta.nic.in). Various educational platforms also provide chapter-wise weightage PDFs.
Chapters like Human Physiology, Genetics & Evolution, Ecology, and Biotechnology have the highest weightage in NEET Biology. These topics require extra focus during preparation.
Focus on high-weightage topics first. Revise NCERT thoroughly, practice previous years' papers, and take mock tests to strengthen weak areas and maximize scores.
To improve your marks in NEET mock tests,
Analyze your performance
Identify weak areas
Focus on strengthening those areas by revising concepts, solving problems, and practicing regularly with mock tests and previous years' papers
Doubt solving
Repeated evaluation
Make a mistake copy
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Mock tests help in simulation of real neet so you should keep in mind the following points
Should be ncert based
Should have time stamps
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The leading coaching institutes like Allen, Aakash,PW provides the best mock papers to make candidate neet ready. You can take their mock tests by paying a nominal fee.
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Neet has made several amendments in Neet syllabus from 2023 onwards implementing NEP 2020. A considerable number of chapters have been removed from the 3 subjects with more being in the Chemistry.
Check here for deleted chapters and upgraded syllabus: https://medicine.careers360.com/articles/neet-deleted-syllabus-2025
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Accorded Institution of Eminence by MoE, Govt. of India | NAAC A++ Grade | Ranked #4 India by NIRF 2024
Accorded Institution of Eminence by MoE, Govt. of India | NAAC A++ Grade | Ranked #4 India by NIRF 2024
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