Biology Syllabus if your are preparing for NEET 2026, understanding the official Biology syllabus is your first — and most critical — step. Biology carries 360 out of 720 marks in NEET, making it the single highest-scoring subject. One wrong chapter left out, or one deleted topic wasted on, can cost you valuable rank.

This guide gives you a complete, chapter-wise breakdown of the NEET 2026 Biology syllabus as released by the National Testing Agency (NTA), including what’s been removed in the latest NCERT rationalisation, which units carry maximum weightage, and how to build a strategy that actually works.

NEET 2026 Biology Syllabus Overview

Before diving deep, here’s a quick snapshot of the Biology syllabus structure:

Detail	Information
Exam Name	National Eligibility cum Entrance Test (NEET) 2026
Conducting Body	National Testing Agency (NTA)
Biology Total Marks	360 Marks (out of 720)
No. of Questions	90 Questions (45 Botany + 45 Zoology)
Class 11 Chapters	10 Units
Class 12 Chapters	5 Units
Total Biology Chapters	38 Chapters (Class 11 + 12 combined)
Question Paper Type	Multiple Choice Questions (MCQs)
Marking Scheme	+4 for correct, -1 for wrong
Official Source	NTA / NCERT (nta.ac.in)

NEET 2026 Biology Syllabus – Class 11 (Unit-wise)

The Class 11 Biology portion contributes approximately 40–45% of questions in NEET Biology. Here are all 10 units with key topics:

Unit No.	Unit Name	Key Topics
Unit 1	Diversity of Living Organisms	Five Kingdom Classification, Binomial Nomenclature, Kingdoms Monera, Protista, Fungi, Plantae, Animalia
Unit 2	Structural Organisation in Animals and Plants	Morphology of Flowering Plants, Tissues in Plants and Animals, Cockroach Anatomy
Unit 3	Cell: Structure and Function	Cell Theory, Prokaryotic vs Eukaryotic Cells, Cell Organelles, Biomolecules, Cell Division (Mitosis & Meiosis)
Unit 4	Plant Physiology	Photosynthesis, Respiration in Plants, Plant Growth and Development, Transport in Plants, Mineral Nutrition
Unit 5	Human Physiology	Digestion & Absorption, Breathing & Gas Exchange, Body Fluids, Locomotion, Neural Control, Chemical Coordination

NEET 2026 Biology Syllabus – Class 12 (Unit-wise)

Class 12 Biology forms the remaining 55–60% of NEET Biology. Genetics, Evolution, and Ecology are historically the most question-heavy areas.

Unit No.	Unit Name	Key Topics
Unit 6	Reproduction	Sexual Reproduction in Flowering Plants, Human Reproduction, Reproductive Health
Unit 7	Genetics and Evolution	Principles of Inheritance, Molecular Basis of Inheritance, Evolution, Human Health & Disease
Unit 8	Biology and Human Welfare	Microbes in Human Welfare, Improvement in Food Production, Human Health
Unit 9	Biotechnology and its Applications	Principles and Processes of Biotechnology, Applications in Agriculture & Medicine
Unit 10	Ecology and Environment	Organisms and Populations, Ecosystem, Biodiversity and Conservation, Environmental Issues

NEET 2026 Biology – Deleted Topics After NCERT Rationalisation

NTA revised the syllabus based on NCERT rationalisation. The following topics have been removed from the NEET 2026 Biology syllabus. Do NOT prepare these — save your time for high-yield chapters.

Class	Chapter / Unit	Deleted / Reduced Topics
Class 11	Transport in Plants	Minor subtopics on passive transport mechanisms (partially removed)
Class 11	Mineral Nutrition	Detailed micronutrient toxicity content (reduced)
Class 11	Digestion & Absorption	Some detailed sections on digestive gland functions (partially removed)
Class 12	Reproduction in Organisms	Entire chapter deleted from NEET scope
Class 12	Strategies for Enhancement in Food Production	Full chapter removed
Class 12	Environmental Issues	Certain subtopics reduced; verify with official NTA PDF

NEET 2026 Biology: Chapter-wise Weightage & Exam Importance

Based on NEET PYQ (Previous Year Question) analysis from 2018–2025, here is how Biology chapters are weighted:

Chapter	Class	Avg. Questions (per paper)	Priority Level
Molecular Basis of Inheritance	XII	5–7	🔴 Very High
Human Physiology (All chapters)	XI	8–10	🔴 Very High
Genetics (Mendelian & Chromosomal)	XII	5–7	🔴 Very High
Cell Biology & Cell Division	XI	4–6	🔴 Very High
Plant Kingdom / Animal Kingdom	XI	4–6	🟠 High

Ecosystem & Biodiversity	XII	3–5	🟠 High
Biotechnology	XII	3–4	🟠 High
Plant Physiology	XI	3–4	🟡 Medium
Human Reproduction	XII	2–3	🟡 Medium
Microbes in Human Welfare	XII	1–2	🟢 Moderate

Botany vs Zoology: How to Balance Your NEET 2026 Biology Preparation

NEET Biology is split 50-50 — 45 questions from Botany and 45 from Zoology. Students often neglect one side, which is a costly mistake.

Botany Focus Areas (Class XI & XII)

• Plant Kingdom classification — salient features of all groups
• Photosynthesis — light reactions, dark reactions, photorespiration
• Plant growth regulators — auxins, gibberellins, cytokinins, ABA, ethylene
• Sexual reproduction in flowering plants — double fertilisation, endosperm
• Biotechnology — rDNA technology, PCR, ELISA, transgenic plants
• Ecosystem — energy flow, nutrient cycles, ecological pyramids

Zoology Focus Areas (Class XI & XII)

• Animal Kingdom — Porifera to Chordata, characteristic features
• Digestion, Breathing, Circulation, Excretion — all human physiology systems
• Neural and chemical coordination — neuron structure, reflex arc, endocrine glands
• Human Reproduction — gametogenesis, fertilisation, embryonic development
• Human health and disease — immunity, pathogens, drugs, alcohol
• Evolution — Darwinism, Hardy-Weinberg, speciation

How to Prepare NEET 2026 Biology Syllabus: Proven Strategy

Step 1: Master NCERT First

Every NEET Biology question originates from NCERT Class 11 and 12 textbooks. Read each line. Every table, every diagram, and every boxed example is exam material. Do not skip the ‘summary’ sections at the end of each chapter.

Step 2: Build a Chapter Priority List

Use the weightage table above to create a tiered study plan. High-priority chapters (Molecular Basis of Inheritance, Human Physiology, Genetics) should receive 60% of your study time.

Step 3: Solve PYQs Chapter-wise

After completing each chapter, immediately solve all NEET PYQs from that chapter (2012–2025). This builds pattern recognition and reveals what NTA actually tests vs. what seems important but rarely appears.

Step 4: Make Revision Notes + Flashcards

Biology is heavily memory-dependent. Create one-page summary sheets per chapter covering definitions, classifications, and diagrams. Revise these every Sunday throughout your preparation.

Step 5: Take Full-Length Mock Tests

Simulate NEET exam conditions monthly. Analyse your Biology section performance — which units are you losing marks in, and why? Course-correct accordingly.

Conclusion: Your NEET 2026 Biology Success Starts Here

The NEET 2026 Biology syllabus is vast, but it is entirely conquerable with the right plan. Biology is the highest-scoring section of NEET — 360 marks — and students who treat it strategically, rather than casually, consistently dominate the merit list.

Focus on NCERT as your bible, prioritise high-weightage chapters like Genetics, Human Physiology, and Cell Biology, stay updated on deleted topics so you don’t waste time, and practice relentlessly with PYQs and full-length mocks. The NEET rank you want is a result of the preparation habits you build today.

At Chaitanya Bharathi Academy, our Biology faculty have helped hundreds of students go from average scores to 320+ in Biology alone. The syllabus is the same for everyone — the strategy is what sets toppers apart.

At Chaitanya Bharathi Academy (chaitanyabharathiacademy.in), we have helped thousands of NEET aspirants master Biology through our structured curriculum, expert faculty, and rigorous test series — all aligned with the latest NTA syllabus.

Why students choose Chaitanya Bharathi Academy:

• 100% NCERT-aligned Biology teaching with concept clarity focus
• Chapter-wise PYQ sessions with detailed solution walkthroughs
• Dedicated Biology doubt-clearing sessions with expert faculty
• Weekly biology tests mapped to NEET exam pattern
• Personalised performance tracking and rank projection

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Frequently Asked Questions (FAQs) – NEET 2026 Biology Syllabus

Q1. What is the NEET 2026 Biology syllabus based on?

The NEET 2026 Biology syllabus is based on NCERT Class 11 and Class 12 Biology textbooks, as specified by the National Testing Agency (NTA). It covers topics from Botany and Zoology across 38 chapters.

Q2. How many chapters are in the NEET 2026 Biology syllabus?

There are approximately 38 chapters in the NEET 2026 Biology syllabus — covering 10 units from Class 11 and 5 units from Class 12.

Q3. Which Biology chapters are deleted from NEET 2026?

Based on NCERT rationalisation, ‘Reproduction in Organisms’ and ‘Strategies for Enhancement in Food Production’ have been removed from the NEET 2026 Biology scope. Some sections of Transport in Plants, Mineral Nutrition, and Environmental Issues have also been reduced.

Q4. Is NCERT enough for NEET 2026 Biology?

NCERT is the foundation and is non-negotiable. However, for top ranks (AIR under 1000), supplementing NCERT with quality coaching material, PYQ analysis, and mock tests from a reputed institute like Chaitanya Bharathi Academy significantly improves your score.

Q5. How many Biology questions come in NEET 2026?

NEET 2026 will have 90 Biology questions — 45 from Botany and 45 from Zoology — carrying a total of 360 marks.

Q6. What is the best way to study the NEET 2026 Biology syllabus?

Start with NCERT reading (at least 3 full readings), then solve PYQs chapter-wise, create revision notes, and take regular mock tests. Focus highest energy on Genetics, Human Physiology, and Cell Biology.