Which chapters have the highest weightage in NEET?

By approximate estimates from recent papers: Mechanics in Physics (roughly 52–60 marks), then Human Physiology and Genetics & Evolution (roughly 40–48 marks each), then Plant Physiology, Ecology and Electrostatics + Current Electricity (roughly 20–24 marks each). NTA publishes no official weightage, and each paper varies.

How many chapters are there in NEET syllabus?

The NMC syllabus used for NEET-UG 2026 has 50 units: 20 in Physics, 20 in Chemistry and 10 in Biology, each covering one or more NCERT chapters. No 2027 syllabus has been published yet, so prepare from the 2026 one. You need to cover nearly all of it for a top score, but high-weightage units should come first.

Is Class 11 or Class 12 more important for NEET?

Both matter about equally in terms of marks. Class 11 Biology (Diversity of Living Organisms, Plant Physiology, Cell Biology, Human Physiology) is often found harder by students, while Class 12 units such as Genetics, Reproduction and Ecology are tested heavily. A balanced approach is essential.

Which Biology chapters should I prioritise for NEET?

Top priority, by approximate estimates from recent papers: Human Physiology (10–12 questions), Genetics & Evolution (10–12), Reproduction (5–7), Ecology (5–6) and Cell Biology (4–5). Together these carry roughly 34–42 of the 90 Biology questions. Master these first, then expand to other chapters.

Can I score 600+ by studying only high-weightage chapters?

No. High-weightage chapters carry a large share of the paper, but a 600+ score needs almost the whole syllabus. Studying high-weightage chapters first is still the smartest order — it maximises marks early in your preparation.

Does NEET repeat questions from previous years?

NEET does not repeat exact questions, but concepts and question patterns come up again and again. This is why solving recent previous years' papers is one of the most effective preparation strategies — including the 21 June 2026 re-exam paper (the 3 May 2026 paper was cancelled).

NEET Chapter-Wise Weightage (Approximate)

NTA does not publish chapter-wise weightage for NEET. The figures on this page are approximate estimates from recent papers — use them to prioritise, not as official numbers. By these estimates, Mechanics is the biggest unit in Physics (roughly 52–60 marks), and Human Physiology and Genetics & Evolution are the biggest in Biology (roughly 40–48 marks each). Chapters that are no longer in the NEET syllabus have been left out.

NEET has 180 compulsory questions: 45 each in Physics, Chemistry, Botany and Zoology, at +4 / −1. Each question is worth 4 marks, so a unit with 5 questions is worth about 20 marks.

Biology — Chapter Wise Weightage (360 marks)

Biology is 50% of NEET, and most questions track the NCERT text closely — which makes it the most scoring subject for well-prepared students.

Botany (180 marks — 45 questions)

Unit / Chapter	Approx. Questions	Approx. Marks	Priority
Plant Diversity (Classification, Plant Kingdom)	3–4	12–16	Must Do
Plant Morphology & Anatomy	3–4	12–16	Must Do
Cell Biology (Cell Structure, Division)	4–5	16–20	Must Do
Biomolecules	2–3	8–12	High
Plant Physiology (Photosynthesis, Respiration, Growth)	5–6	20–24	Must Do
Reproduction in Plants	2–3	8–12	High
Genetics (Mendelian, Molecular Biology)	5–6	20–24	Must Do
Biotechnology (Principles + Applications)	3–4	12–16	High
Ecology & Environment	5–6	20–24	Must Do

Zoology (180 marks — 45 questions)

Unit / Chapter	Approx. Questions	Approx. Marks	Priority
Animal Diversity (Classification, Animal Kingdom)	3–4	12–16	Must Do
Structural Organisation in Animals	2–3	8–12	High
Human Physiology (Breathing, Circulation, Excretion, Locomotion, Neural, Endocrine)	10–12	40–48	Must Do
Human Reproduction & Reproductive Health	3–4	12–16	Must Do
Genetics & Evolution	5–6	20–24	Must Do
Biology in Human Welfare (Health, Immunity, Microbes)	3–4	12–16	High

Key insight: By these estimates, Human Physiology carries around 45 marks — more than any single Chemistry chapter. Make it your strongest unit. (Digestion and Absorption is not in the current syllabus.)

Chemistry — Chapter Wise Weightage (180 marks)

The 45 Chemistry questions are spread across Physical, Organic and Inorganic Chemistry, with Physical Chemistry (including Chemical Bonding) usually carrying the most. Chapters no longer in the syllabus — States of Matter, Solid State, Surface Chemistry, s-Block, Hydrogen, Metallurgy, Polymers, Environmental Chemistry and Chemistry in Everyday Life — are not listed.

Physical Chemistry

Chapter	Approx. Questions	Approx. Marks	Priority
Mole Concept & Stoichiometry	1–2	4–8	Must Do
Atomic Structure	1–2	4–8	Must Do
Chemical Bonding	2	8	Must Do
Thermodynamics	1–2	4–8	Must Do
Equilibrium	2	8	Must Do
Redox & Electrochemistry	1–2	4–8	High
Chemical Kinetics	1–2	4–8	High
Solutions	1	4	High

Organic Chemistry

Chapter	Approx. Questions	Approx. Marks	Priority
GOC (General Organic Chemistry) & Purification	1–2	4–8	Must Do
Hydrocarbons	1–2	4–8	Must Do
Haloalkanes & Haloarenes	1	4	High
Alcohols, Phenols, Ethers	1–2	4–8	High
Aldehydes, Ketones, Carboxylic Acids	2	8	Must Do
Amines	1	4	High
Biomolecules	1–2	4–8	Medium

Inorganic Chemistry

Chapter	Approx. Questions	Approx. Marks	Priority
p-Block Elements (Groups 13–18, general trends)	3–4	12–16	Must Do
d-Block & f-Block Elements	2–3	8–12	Must Do
Coordination Compounds	2	8	Must Do
Periodic Table & Properties	1–2	4–8	High

The syllabus also includes Principles Related to Practical Chemistry (detecting elements and functional groups, preparations, titrations, salt analysis). Expect a question or so from it.

Chapter-wise NEET practice

Practise NEET chapter by chapter with quizzes, flashcards and summaries, starting with the high-weightage chapters.

Practise NEET chapters — start free

Physics — Chapter Wise Weightage (180 marks)

Chapter / Unit	Approx. Questions	Approx. Marks	Priority
Mechanics (Kinematics, NLM, WEP, Rotational, Gravitation, Properties of Matter)	13–15	52–60	Must Do
Electrostatics & Current Electricity	5–6	20–24	Must Do
Magnetism & EMI	3–4	12–16	Must Do
Optics (Ray + Wave)	3–4	12–16	Must Do
Modern Physics & Semiconductors	3–4	12–16	High
Thermodynamics & KTG	2–3	8–12	High
Waves & Oscillations	2–3	8–12	High
AC & EM Waves	1–2	4–8	Medium
Units, Measurements & Errors	1	4	Easy marks

Key insight: By these estimates Mechanics is roughly a third of NEET Physics. Master Mechanics and you are already strong in Physics. The syllabus also has an Experimental Skills unit (screw gauge, vernier callipers, metre bridge and other listed experiments) — worth a quick revision.

Highest-Weightage Units Across All Subjects

Approximate estimates from recent papers, not official figures.

Rank	Unit	Subject	Approx. Marks
1	Mechanics (combined)	Physics	52–60
2	Human Physiology	Zoology	40–48
3	Genetics & Evolution	Biology	40–48
4	Ecology & Environment	Botany	20–24
5	Plant Physiology	Botany	20–24
6	Electrostatics & Current Electricity	Physics	20–24
7	Cell Biology	Botany	16–20
8	p-Block Elements	Chemistry	12–16
9	Optics	Physics	12–16
10	Magnetism & EMI	Physics	12–16

Several other units sit at around 12–16 marks too, including Plant and Animal Diversity, Biotechnology, Human Reproduction and Modern Physics.

How to Use This Data

Start with "Must Do" chapters — they carry a large share of the paper and are the foundation of your preparation.
Biology gets 50% of your study time — it carries 50% of marks and is the most scoring (NCERT-based).
Do not ignore low-weightage chapters — they often have the easiest questions. Units & Measurement, Biomolecules and the experiment-based questions are often quick marks.
Revise in order of weightage — when time is limited, always revise Human Physiology, Genetics, Mechanics and Physical Chemistry first.
Mock test focus — if you lose marks in a high-weightage chapter in mocks, fix that gap immediately before the next mock.

Weightage figures are approximate estimates from recent NEET papers; NTA publishes no official chapter-wise weightage and individual papers vary. Chapter coverage follows the NMC syllabus in NTA's NEET-UG 2026 bulletin. Use this as a prioritisation guide, not an exact prediction.

NEET Chapter-Wise Weightage — Physics, Chemistry, Biology (Approximate)