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Download free NEET Biology notes PDF for 2026. Chapter-wise study material covering Class 11 & 12 NCERT, handwritten notes, diagrams, and quick revision sheets prepared by AIIMS faculty.
Remember these points for your NEET preparation
Biology is the most scoring subject in NEET, contributing 360 marks out of 720 (50% of total). With the right notes and systematic revision, you can easily score 320+ in Biology alone.
This page provides comprehensive NEET Biology notes prepared by Dr. Shekhar (AIIMS Delhi Alumnus) covering all 38 chapters from Class 11 and 12 NCERT.
| Fact | Data |
|---|---|
| NEET Biology questions from NCERT | 90-95% |
| Direct NCERT line questions | 60-70% |
| Diagram-based questions | 15-20% |
| Application-based questions | 10-15% |
Key Insight: Students who master NCERT Biology score an average of 40-50 marks more than those who rely only on reference books.
| Unit | Chapters | NEET Weightage |
|---|---|---|
| Diversity of Living Organisms | 4 chapters | 12-14% |
| Structural Organization | 2 chapters | 5-7% |
| Cell Structure & Function | 4 chapters | 9-11% |
| Plant Physiology | 5 chapters | 6-9% |
| Human Physiology | 7 chapters | 14-16% |
| Unit | Chapters | NEET Weightage |
|---|---|---|
| Reproduction | 4 chapters | 9-12% |
| Genetics & Evolution | 5 chapters | 16-18% |
| Biology in Human Welfare | 3 chapters | 8-10% |
| Biotechnology | 2 chapters | 6-8% |
| Ecology | 2 chapters | 10-12% |
Key Topics:
Important Points:
NEET Focus: 2-3 questions expected, mostly factual
Key Topics:
Important Tables:
| Kingdom | Cell Type | Cell Wall | Nutrition |
|---|---|---|---|
| Monera | Prokaryotic | Present (peptidoglycan) | Autotrophic/Heterotrophic |
| Protista | Eukaryotic | Present/Absent | Autotrophic/Heterotrophic |
| Fungi | Eukaryotic | Present (chitin) | Heterotrophic |
| Plantae | Eukaryotic | Present (cellulose) | Autotrophic |
| Animalia | Eukaryotic | Absent | Heterotrophic |
NEET Focus: 3-4 questions expected
Key Topics:
Important Comparisons:
| Feature | Bryophytes | Pteridophytes | Gymnosperms |
|---|---|---|---|
| Vascular tissue | Absent | Present | Present |
| Dominant phase | Gametophyte | Sporophyte | Sporophyte |
| Seeds | Absent | Absent | Present (naked) |
NEET Focus: 2-3 questions expected
Key Topics:
Mnemonic for Phyla: Poor Cute Platypus Ate My Entire Apple Cake (Porifera, Cnidaria, Platyhelminthes, Aschelminthes, Mollusca, Echinodermata, Arthropoda, Chordata)
NEET Focus: 4-5 questions expected (high weightage chapter)
Key Topics:
Important Diagram Points:
NEET Focus: 3-4 questions expected
Key Topics:
Important Facts:
NEET Focus: 3-4 questions expected
Key Topics:
Key Differences:
| Feature | Mitosis | Meiosis |
|---|---|---|
| Division type | Equational | Reductional |
| Daughter cells | 2 (diploid) | 4 (haploid) |
| Crossing over | No | Yes (Prophase I) |
| Occurs in | Somatic cells | Germ cells |
NEET Focus: 3-4 questions expected
Key Topics:
Important Enzymes Table:
| Organ | Enzyme | Substrate | Product |
|---|---|---|---|
| Mouth | Salivary amylase | Starch | Maltose |
| Stomach | Pepsin | Proteins | Peptones |
| Pancreas | Trypsin | Proteins | Peptides |
| Pancreas | Lipase | Fats | Fatty acids + Glycerol |
| Intestine | Lactase | Lactose | Glucose + Galactose |
NEET Focus: 3-4 questions expected
Key Topics:
Important Values:
NEET Focus: 2-3 questions expected
Key Topics:
Important Facts:
NEET Focus: 4-5 questions expected (high yield)
Key Topics:
Key Process: Urine Formation
NEET Focus: 3-4 questions expected
Key Topics:
Sliding Filament Theory Key Points:
NEET Focus: 2-3 questions expected
Key Topics:
Important Diagram: Human brain (learn all parts and functions)
NEET Focus: 3-4 questions expected
Key Topics:
Hormones Table:
| Gland | Hormone | Function |
|---|---|---|
| Pituitary | GH | Growth |
| Thyroid | T3, T4 | Metabolism |
| Pancreas | Insulin | Blood glucose ↓ |
| Adrenal | Cortisol | Stress response |
| Gonads | Estrogen/Testosterone | Sexual development |
NEET Focus: 4-5 questions expected (high yield)
Key Topics:
NEET Focus: 1-2 questions expected
Key Topics:
Double Fertilization:
NEET Focus: 4-5 questions expected
Key Topics:
Menstrual Cycle Phases:
NEET Focus: 4-5 questions expected (high yield)
Key Topics:
NEET Focus: 2-3 questions expected
Key Topics:
Mendel's Laws:
NEET Focus: 5-6 questions expected (highest yield chapter)
Key Topics:
Central Dogma: DNA → (Transcription) → RNA → (Translation) → Protein
NEET Focus: 5-6 questions expected (highest yield chapter)
Key Topics:
NEET Focus: 3-4 questions expected
Key Topics:
Population Growth:
NEET Focus: 3-4 questions expected
Key Topics:
10% Law: Only 10% energy transfers to next trophic level
NEET Focus: 4-5 questions expected
Key Topics:
NEET Focus: 2-3 questions expected
Access our comprehensive NEET Biology notes:
| Resource | Description | Access |
|---|---|---|
| Chapter-wise Notes | All 38 chapters covered | View Notes |
| Quick Revision Sheets | One-pagers for each chapter | View Sheets |
| Important Diagrams | 100+ NCERT diagrams | View Diagrams |
| Mnemonics Collection | Memory aids for all topics | View Mnemonics |
| PYQ Chapter-wise | 10 years solved | View PYQs |
| Time | Activity |
|---|---|
| Morning (1 hour) | Read new chapter from NCERT |
| Afternoon (1 hour) | Review corresponding notes |
| Evening (1 hour) | Solve MCQs from that chapter |
| Night (30 min) | Quick revision of key points |
| Day | Chapters to Revise |
|---|---|
| Monday | Cell Biology (Ch 5-7) |
| Tuesday | Human Physiology Part 1 (Ch 8-11) |
| Wednesday | Human Physiology Part 2 (Ch 12-14) |
| Thursday | Genetics (Ch 19-20) |
| Friday | Reproduction (Ch 15-18) |
| Saturday | Ecology (Ch 22-24) |
| Sunday | Full revision + Mock test |
These NEET Biology notes are designed to complement your NCERT preparation. Remember:
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Share your thoughts, ask questions, or help fellow NEET aspirants
How many hours should I study Biology daily for NEET?
For NEET Biology, aim for 3-4 hours of focused study daily. Quality matters more than quantity!
Is NCERT enough for Biology in NEET?
Yes! NCERT covers 95% of NEET Biology questions. Master it completely before any reference book.
Which chapters have maximum weightage?
Human Physiology (20%), Genetics (18%), and Ecology (12%) are the highest-scoring areas.
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