Introduction
NEET Biology accounts for 50% of the paper (90 questions), and with NCERT-based questions dominating the section, it becomes the most scoring subject if prepared smartly. In this post, we’ll cover chapter-wise NEET Biology weightage for 2025, plus the best tips to crack it.
NEET Biology Syllabus Overview
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Total Questions: 90
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Marks: 360 out of 720
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Divided equally from Class 11 and Class 12
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Based on NCERT Biology Books (100% questions are directly or indirectly from it)
📘 Class 11 Biology Chapter-wise Weightage
| Chapter | Expected No. of Questions | Weightage (%) |
|---|---|---|
| Diversity of Living Organisms | 5–6 | ~12% |
| Structural Organisation in Animals & Plants | 3–4 | ~6% |
| Cell Structure and Function | 5–6 | ~10% |
| Plant Physiology | 4–5 | ~8% |
| Human Physiology | 10–12 | ~20% |
📗 Class 12 Biology Chapter-wise Weightage
| Chapter | Expected No. of Questions | Weightage (%) |
|---|---|---|
| Reproduction (Plant & Human) | 5–6 | ~10% |
| Genetics & Evolution | 6–8 | ~15% |
| Biology in Human Welfare | 1–2 | ~2% |
| Biotechnology | 3–4 | ~5% |
| Ecology & Environment | 6–8 | ~12% |
| |||
|---|---|---|---|
Top High-Weightage Topics (Must-Revise First)
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Human Physiology
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Genetics & Molecular Basis of Inheritance
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Ecology
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Cell Cycle and Structure
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Plant Physiology (Photosynthesis & Transport)
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Reproductive Health
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Biotechnology Principles and Processes
Smart Preparation Strategy for NEET 2025 Biology
1. Stick to NCERT
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Read every line of NCERT. Diagram labels are often asked directly.
2. Make Short Notes
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Prepare crisp notes of each chapter. Write down facts, terms, and examples.
3. Revise with MCQs
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Use previous year NEET papers, NCERT-based MCQ books (like MTG or Trueman’s).
4. Solve Chapter-Wise Tests
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Use platforms like Embibe, Unacademy, or Allen Test Series.
5. Follow a Time-Table
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Dedicate 2 hours daily for Biology if you’re also studying Physics/Chem.
6. Revise Weekly
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Sunday = quick revision + test of all biology studied that week.
Conclusion
If you approach NEET Biology with topic-wise planning, mastering NCERT, and consistent practice, you can easily score 300+ in Biology alone. Start with high-weightage chapters and stay regular with your revision.
| Topic | Link |
|---|---|
| Types of Eggs | Developmental Biology | View Article |
| 30 Best Presentation Topics in Biology (USA) | View Article |
| Steps Involved in Pisciculture | View Article |
| DNA Fingerprinting: Procedure, Advantage & Application | View Article |
| Ant Life Cycle: Stages and Development | View Article |
| Biology and Characteristics of Living Things | View Article |
| Predator, Parasitic & Saprophytic Food Chains | View Article |
| Whittaker's Five Kingdom Classification | View Article |
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