NCERT Class 12 Biology: Complete Chapter-wise Solutions & Exam Guide (2025-26)
📌 Overview
Phymatry provides step-by-step NCERT solutions for all 16 chapters of Class 12 Biology, covering:
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In-text & Exercise problems
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Diagram-based explanations
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Important definitions & concepts
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CBSE/NEET-aligned content
📚 Chapter List & Solutions
| Chapter | Key Topics | Exercises | Solutions PDF | Video Lessons |
|---|---|---|---|---|
| 1. Reproduction in Organisms | Asexual vs Sexual reproduction | Ex 1.1-1.12 | [📥 Download] | [▶ Watch] |
| 2. Sexual Reproduction in Flowering Plants | Pollination, Double fertilization | Ex 2.1-2.21 | [📥 Download] | [▶ Watch] |
| 3. Human Reproduction | Menstrual cycle, Embryogenesis | Ex 3.1-3.14 | [📥 Download] | [▶ Watch] |
| 4. Reproductive Health | Contraception, STDs | Ex 4.1-4.11 | [📥 Download] | [▶ Watch] |
| 5. Principles of Inheritance | Mendel’s laws, Pedigree analysis | Ex 5.1-5.21 | [📥 Download] | [▶ Watch] |
| 6. Molecular Basis of Inheritance | DNA replication, Transcription | Ex 6.1-6.24 | [📥 Download] | [▶ Watch] |
| 7. Evolution | Hardy-Weinberg, Speciation | Ex 7.1-7.12 | [📥 Download] | [▶ Watch] |
| 8. Human Health & Disease | Immunity, Cancer, AIDS | Ex 8.1-8.18 | [📥 Download] | [▶ Watch] |
| 9. Biotechnology | PCR, Gene therapy | Ex 9.1-9.12 | [📥 Download] | [▶ Watch] |
| 10. Ecology | Food chains, Biodiversity | Ex 10.1-10.15 | [📥 Download] | [▶ Watch] |
🔗 Download All: [Complete Class 12 Biology Solutions]
📊 Exam Analytics
CBSE Weightage (Theory: 70 Marks)
| Unit | Chapters | Marks (2025 Trend) |
|---|---|---|
| Genetics | Ch 5-6 | 18 |
| Human Physiology | Ch 3,8 | 14 |
| Biotechnology | Ch 9,11 | 12 |
| Ecology | Ch 10,13 | 10 |
NEET Importance
| Chapter | Expected Questions (2025) |
|---|---|
| Molecular Basis of Inheritance | 4-5 |
| Human Reproduction | 3-4 |
| Biotechnology | 2-3 |
🎯 Key Features
✔ Diagram-Based Learning: Labeled diagrams of flowering plants, DNA structure, ecological pyramids
✔ NEET-Specific Notes: Highlighted previous year questions in solutions
✔ Practical Focus: Viva Q&A for spotting (flowers, slides), experiments
✔ Mnemonics: For memorizing diseases, genetic disorders
📌 Biology-Specific Notes
High-Weightage Chapters
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Molecular Basis of Inheritance (12 marks CBSE | 5 Qs NEET)
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Human Health & Disease (8 marks CBSE | 4 Qs NEET)
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Biotechnology (10 marks CBSE | 3 Qs NEET)
Tricky Topics
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Transcription vs Translation
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Hardy-Weinberg Principle
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PCR Steps
❓ FAQs
Q: How to score 90+ in CBSE Biology?
A: Master diagrams, definitions, and NCERT examples (80% paper comes from NCERT).
Q: Are NCERT diagrams enough for NEET?
A: Yes! Practice all NCERT diagrams (e.g., DNA replication, menstrual cycle).
Q: Best reference book with NCERT?
A: NCERT + Trueman’s Biology (Theory) + MTG NEET Objective NCERT at Your Fingertips.
🚀 Beyond NCERT
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NEET Diagram Book: [Download 100+ Diagrams]
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CBSE Sample Papers 2025: [Latest Papers]
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3D Biology Animations: [Watch Here]