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NEET Biology Chapter-Wise Weightage 2026 by NTA - Class 11 & 12 Biology Chapter-wise Weightage
NEET Biology Chapter-Wise Weightage 2026 Biology is the most reliable guide for aspirants to plan their preparation. Biology alone have 50% of the total NEET score, carrying 90 questions out of 180 for a total of 360 marks. These 90 questions are divided between Class 11 and Class 12, covering both Botany and Zoology. Hence, knowing the biology chapter‑wise weightage and class‑wise distribution helps students identify high‑scoring biology topics and focus their NEET 2026 revision effectively.
Live | Jul 14, 2026 | 7:10 PM IST
This Story also Contains
- NEET 2026 Class 11 Chapter-wise Weightage for Biology
- NEET 2026 Class 12 Chapter-wise Weightage for Biology
- Importance of NEET Biology Chapter-Wise Weightage 2026
- Most Important Biology Chapters for NEET 2026
- Is Biology Tough in NEET?
According to the biology NEET PYQs analysis, Class 12 Biology carries around 55-60% weightage, while Class 11 adds 40-45% that contributes half of the exam pattern. Understanding the NEET chapter-wise weightage helps students prepare more strategically. By focusing more time on biology high-weightage chapters like Genetics, Physiology, Ecology, and Biotechnology, aspirants can maximise their marks and improve their chances of securing a top rank in the NEET exam.
NEET 2026 Class 11 Chapter-wise Weightage for Biology
When it comes to NEET 2026 Biology chapter-wise distribution, chapters like cell structure, plant physiology, human physiology, and biological classification from Class 11 form important NEET questions. These chapters form the base for many Class 12 concepts as well. The NEET Biology chapter weightage 2026 also suggests that the foundational topics from Class 11 are often tested directly or indirectly. The table below shows the NEET chapter-wise weightage for Class 11 Biology based on the past 5 year exam analysis.
| Chapter | 2021 | 2022 | 2023 | 2024 | 2025 | Weightage (%) |
| 4 | 1 | 3 | 5 | 3 | 9.47% | |
| 3 | 3 | 3 | 4 | 2 | 8.88% | |
| 1 | 2 | 2 | 2 | 1 | 4.73% | |
| 5 | 6 | 6 | 5 | 0 | 13.02% | |
| 3 | 3 | 2 | 4 | 3 | 8.88% | |
| 3 | 3 | 3 | 5 | 6 | 11.83% | |
| 5 | 4 | 5 | 2 | 3 | 11.24% | |
| 2 | 2 | 3 | 3 | 2 | 7.10% | |
| 2 | 2 | 0 | 2 | 1 | 4.14% | |
| 1 | 1 | 2 | 2 | 0 | 3.55% | |
| 5 | 4 | 4 | 6 | 6 | 14.79% | |
| 1 | 0 | 2 | 4 | 6 | 7.69% | |
| 0 | 3 | 3 | 1 | 6 | 7.69% | |
| 0 | 2 | 1 | 2 | 0 | 2.96% | |
| 0 | 0 | 2 | 2 | 1 | 2.96% |
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NEET 2026 Class 12 Chapter-wise Weightage for Biology
The NEET 2026 Biology weightage for Class 12 highlights important chapters, such as genetics and evolution, human health and disease, biotechnology and reproduction, which are often the most frequently asked biology concepts in exams. These chapters contain many direct concepts and definitions that are easier to remember and score. Focusing well on the NEET do-or-die Biology chapters 2026 helps in gaining better marks, as they are slightly more application-based. The table below shows the chapter-wise weightage for Class 12 Biology based on the previous years' analysis.
| Chapter | 2021 | 2022 | 2023 | 2024 | 2025 | Weightage (%) |
| 3 | 4 | 2 | 1 | 5 | 6.58% | |
| 8 | 6 | 5 | 7 | 4 | 13.16% | |
| 8 | 6 | 3 | 2 | 3 | 9.65% | |
| 4 | 3 | 4 | 2 | 2 | 6.58% | |
| 2 | 4 | 5 | 6 | 5 | 9.65% | |
| 3 | 2 | 2 | 4 | 1 | 5.26% | |
| 3 | 4 | 2 | 2 | 3 | 6.14% | |
| 3 | 4 | 3 | 4 | 7 | 9.21% | |
| 4 | 4 | 4 | 4 | 7 | 10.09% | |
| 11 | 9 | 7 | 6 | 7 | 17.54% | |
| 2 | 2 | 1 | 1 | 4 | 4.39% | |
| 4 | 2 | 2 | 2 | 0 | 4.39% |
Video: NEET Biology Chapterwise Weightage (2021–2025) | Most Important Chapters for NEET
Importance of NEET Biology Chapter-Wise Weightage 2026
Biology is the most important subject in NEET 2026 because it covers half of the question paper and can significantly boost your overall score. The subject is generally considered easier to understand than physics and chemistry, especially if you understand the concepts well. Knowing the NEET Biology chapter-wise weightage 2026 will help to score well and make a big difference in getting a good rank. Paying attention to the NEET Biology important questions to score 330+ marks and revising them regularly is the key to success.
Most Important Biology Chapters for NEET 2026
For NEET 2026 Biology preparation, focus on high-weightage biology chapters to secure higher marks. It includes Human Physiology, Genetics & Evolution, Ecology & Environment, Plant Physiology & Diversity, and Reproduction (both Plant and Human). These areas dominate the Biology section and are essential for securing a high AIR.
Most Important Biology Chapters for NEET 2026 based on PYQs analysis are:
1. Human Physiology
Focus Areas: Circulatory system, digestion, respiration, nervous system, excretory system, endocrine glands
Master NCERT diagrams and flowcharts. Practice Human Physiology NEET PYQs to secure maximum NEET 2026 Biology marks.
2. Genetics and Evolution
Focus Areas: Mendelian genetics, molecular basis of inheritance, DNA replication, genetic disorders, Darwin’s theory
Practice pedigree analysis and genetic cross numericals along with genetics and evolution NEET PYQs.
3. Ecology and Environment
Focus Areas: Ecosystem, biodiversity conservation, environmental issues, population interactions
Ecology is often memory‑based, and learning NCERT examples is one of the most repeated questions in NEET.
4. Plant Physiology & Plant Diversity
Focus Areas: Photosynthesis, respiration in plants, plant growth hormones, classification of plants, morphology, anatomy, cell, cell cycle
Pay attention to the NCERT tables and plant physiology experimental setups.
5. Reproduction (Plant & Human)
Focus Areas: Sexual reproduction in flowering plants, human reproductive system, reproductive health
Practice Human Reproduction NEET PYQs. Learn the NCERT diagrams of fertilisation and gametogenesis carefully, as Reproduction is a scoring NEET 2026 unit.
NEET Syllabus: Subjects & Chapters
Select your preferred subject to view the chapters
Is Biology Tough in NEET?
In the NEET exam, Biology is generally considered an easier section compared to Physics and Chemistry, especially if you've thoroughly studied the NCERT textbooks. Most questions are based on these textbooks and require an understanding of concepts and memorising key terms, processes, and diagrams.
Frequently Asked Questions (FAQs)
Q: What is the total marks of NEET Biology 2026?
A:
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.
Q: Where can I download the official NEET Biology weightage PDF?
A:
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.
Q: Which chapters have the highest weightage in NEET Biology 2026?
A:
Chapters like Human Physiology, Genetics & Evolution, Ecology, and Biotechnology have the highest weightage in NEET Biology. These topics require extra focus during preparation.
Q: How can I use NEET Biology weightage to improve my NEET 2026 score?
A:
Focus on high-weightage topics first. Revise NCERT thoroughly, practice previous years' papers, and take mock tests to strengthen weak areas and maximise scores.
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Hello,
To be eligible for MBBS admission at St. John's Medical College, you must first qualify NEET-UG. However, securing admission generally requires a much higher score than the qualifying marks because the competition is high.
The exact required score varies every year depending on category, number of applicants, seat availability,
Hello Shalini
Please check the link given below:
https://medicine.careers360.com/articles/neet-previous-year-question-paper-with-solution
Hope it helps.
Hello Dear Student,
Getting a government
BAMS
seat in Uttar Pradesh with 330 marks is highly unlikely. While it is possible to qualify, the expected government BAMS cutoff typically ranges from 480 to 540+ depending on your category. You can explore private BAMS options or check exact ranks.
You can
Hello Dear Student,
With 240 marks in NEET 2026 and an SC category domicile in Karnataka, government or semi-government quotas for BDS and BAMS are realistically out of reach, as those require 350–450+ marks. However, you can comfortably secure private quota/management seats within your 3.5 lakh budget.
You can check,
Hello,
This type of mistake does not automatically lead to rejection of your NEET PG application. If you have mistakenly interchanged the permanent and correspondence addresses, your application is generally considered valid as long as your identity, eligibility details, and other mandatory information are correct.
If NBE opens a correction
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