NEET Biology Chapter-Wise Weightage 2026 by NTA - Class 11 & 12 Biology Chapter-wise Weightage
Biology covers the largest portion of NEET, carrying 90 questions out of 180 for a total of 360 marks, which means it alone accounts for 50% of the paper. These 90 questions are usually divided between Class 11 and Class 12, covering both Botany and Zoology. Hence, NEET Biology Chapter-wise Weightage 2026 is a key resource for aspirants who want to score high in the exam.
This Story also Contains
- Importance of NEET Biology Chapter-Wise Weightage 2026
- NEET 2026 Chapterwise Weightage for Biology Class 11
- NEET 2026 Chapterwise Weightage for Biology Class 12
- Which Chapter has the Highest Weightage in Biology for NEET 2026?
- Is Biology Tough in NEET?
Because Biology contributes half of the exam, understanding the chapter-wise weightage helps students prepare more strategically. By focusing more time on 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.
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 it 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.
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NEET 2026 Chapterwise Weightage for Biology Class 11
When it comes to NEET 2026 Biology chapter-wise distribution, chapters like cell structure, plant physiology, human physiology and biological classification from Class 11 are usually given more importance. 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% |
NEET 2026 Chapterwise Weightage for Biology Class 12
The NEET 2026 Biology weightage for Class 12 highlights important chapters such as genetics and evolution, human health and disease, biotechnology and reproduction are often more commonly asked in exams. These chapters contain many direct concepts and definitions that are easier to remember and score. Focusing well on the NEET Biology 2026 important chapters 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
Which Chapter has the Highest Weightage in Biology for NEET 2026?
In NEET Biology, certain chapters consistently appear to have higher weightage based on past exam patterns and analysis. Genetics and Evolution and Ecology, and Environment tend to be significant, with Genetics and Evolution potentially carrying the most weight. Other chapters, like Human Physiology, Plant Physiology, and Reproduction, also frequently have a larger number of questions.
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)
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 maximise scores.
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Questions related to NEET
On Question asked by student community
Hello Student, for NEET-UG , you need to have passed Class 12 or an equivalent examination with the required subjects, including Physics, Chemistry, Biology/Biotechnology and English. For the qualifying examination, the required PCB percentage is generally 50% for General category candidates, 40% for SC/ST/OBC-NCL candidates and 45% for PwBD candidates
Hello Student, agar aapne counselling ke liye registration kar liya hai lekin Round 1 mein choice filling nahi karte, toh generally aapko Round 1 mein seat allotment nahi milega because aapne apni preferences submit nahi ki hain. However, later rounds mein participate karne ka option counselling ke specific rules par
Hi Aditi,
Please refer to this article link : https://medicine.careers360.com/articles/neet-question-paper
It contains NEET previous years' question papers for the last 10 years, compiled in a single place.
Dear Student,
If grace marks have been given in your NEET result, admission eligibility depends on your final valid NEET score, rank and the applicable counselling rules. For BDS admission, you must fulfil the NEET qualifying criteria and participate in counselling. Check the latest BDS Cutoff for NEET 2026
Hello, grace marks in NEET do not determine eligibility for BDS admission. For BDS admission, candidates need to meet the NEET qualifying criteria and the required Class 12 subjects and marks. The eligibility criteria may also vary based on the candidate's category. You can check the detailed BDS eligibility criteria