Loading…
Loading…
NEET UG · subject
Biology is 90 of the 180 questions in NEET UG and 360 of the 720 marks — half the paper, split by NTA into Botany and Zoology sections of 45 questions each. Ranks are decided here: at the top of the list, students are separated by two or three Biology questions, almost all of them answerable from an NCERT line. BrainStride is an AI tutor for JEE, NEET and Olympiad preparation that runs a 20-minute diagnostic, maps your weak chapters and writes a daily plan, with every solution checked by teachers.
Quick answer
Question counts are BrainStride’s analysis of recent NEET papers, not official figures — NTA publishes no chapter weightage. Average questions per paper across the Botany and Zoology sections.
The ten units of the official NEET Biology syllabus. Unit totals are the ranges we publish on the NEET hub page; the chapter table below breaks them down.
| Unit | Chapters | Typical questions | How it is tested |
|---|---|---|---|
| Diversity in Living World | 4 | 8–10 Q | Recall, example-driven |
| Structural Organisation in Animals and Plants | 3 | 5–7 Q | Diagram recall |
| Cell Structure and Function | 3 | 8–10 Q | Recall + reasoning |
| Plant Physiology | 3 | 6–8 Q | Process recall |
| Human Physiology | 6 | 8–12 Q | Recall + application |
| Reproduction | 3 | 8–10 Q | Sequence and diagram recall |
| Genetics and Evolution | 3 | 10–14 Q | Reasoning + numericals |
| Biology and Human Welfare | 2 | 4–6 Q | Recall |
| Biotechnology and its Applications | 2 | 5–7 Q | Process recall |
| Ecology and Environment | 3 | 6–9 Q | Recall, quick marks |
Ranges overlap and are rounded, so chapter ranges do not add up exactly to a unit or subject total. Counts shift by a question or two every year.
All 32 NCERT chapters in the NEET Biology syllabus, in the order the units appear in the official syllabus. Chapter names match the syllabus tracker, so you can tick them off as you finish them.
| Chapter | Unit | Class | Section | Typical questions | The mistake it catches |
|---|---|---|---|---|---|
| 1. The Living World | Diversity in Living World | 11 | Botany | 1–2 Q | Learning the taxonomic hierarchy without the examples it is tested with. |
| 2. Biological Classification | Diversity in Living World | 11 | Botany | 2–3 Q | Mixing five-kingdom criteria with the three-domain system. |
| 3. Plant Kingdom | Diversity in Living World | 11 | Botany | 2–3 Q | Confusing haplontic, diplontic and haplo-diplontic life cycles. |
| 4. Animal Kingdom | Diversity in Living World | 11 | Zoology | 2–3 Q | Placing a phylum by habitat instead of the diagnostic feature. |
| 5. Morphology of Flowering Plants | Structural Organisation in Animals and Plants | 11 | Botany | 2–3 Q | Reading a floral formula without aestivation and placentation. |
| 6. Anatomy of Flowering Plants | Structural Organisation in Animals and Plants | 11 | Botany | 2–3 Q | Swapping dicot and monocot vascular bundle features. |
| 7. Structural Organisation in Animals | Structural Organisation in Animals and Plants | 11 | Zoology | 1–2 Q | Learning frog anatomy without the labels NCERT uses. |
| 8. Cell: The Unit of Life | Cell Structure and Function | 11 | Botany | 3–4 Q | Quoting organelle functions but missing the exceptions NCERT states. |
| 9. Biomolecules | Cell Structure and Function | 11 | Zoology | 2–3 Q | Confusing enzyme classes with their examples. |
| 10. Cell Cycle and Cell Division | Cell Structure and Function | 11 | Botany | 2–3 Q | Putting chromosome number and DNA content at the wrong meiotic stage. |
| 11. Photosynthesis in Higher Plants | Plant Physiology | 11 | Botany | 2–3 Q | Mixing C3 and C4 leaf anatomy with their biochemical steps. |
| 12. Respiration in Plants | Plant Physiology | 11 | Botany | 2–3 Q | Counting ATP without the assumptions NCERT states. |
| 13. Plant Growth and Development | Plant Physiology | 11 | Botany | 2–3 Q | Matching a growth regulator to the wrong classic experiment. |
| 14. Breathing and Exchange of Gases | Human Physiology | 11 | Zoology | 1–2 Q | Mis-stating lung volumes and capacities by definition. |
| 15. Body Fluids and Circulation | Human Physiology | 11 | Zoology | 2–3 Q | Confusing cardiac cycle phases with the ECG waves. |
| 16. Excretory Products and their Elimination | Human Physiology | 11 | Zoology | 1–2 Q | Placing reabsorption in the wrong part of the nephron. |
| 17. Locomotion and Movement | Human Physiology | 11 | Zoology | 1–2 Q | Describing sliding filament theory without what happens to each band. |
| 18. Neural Control and Coordination | Human Physiology | 11 | Zoology | 1–2 Q | Reversing the ion movements in resting and action potentials. |
| 19. Chemical Coordination and Integration | Human Physiology | 11 | Zoology | 2–3 Q | Matching a hormone to the wrong gland or the wrong disorder. |
| 20. Sexual Reproduction in Flowering Plants | Reproduction | 12 | Botany | 3–4 Q | Losing track of ploidy at each stage of the embryo sac. |
| 21. Human Reproduction | Reproduction | 12 | Zoology | 3–4 Q | Mis-timing events in gametogenesis and the menstrual cycle. |
| 22. Reproductive Health | Reproduction | 12 | Zoology | 2–3 Q | Learning contraceptive categories without NCERT’s examples. |
| 23. Principles of Inheritance and Variation | Genetics and Evolution | 12 | Botany | 4–5 Q | Applying a plain 9:3:3:1 where linkage or incomplete dominance changes it. |
| 24. Molecular Basis of Inheritance | Genetics and Evolution | 12 | Botany | 4–6 Q | Blurring prokaryotic and eukaryotic transcription, or the lac operon states. |
| 25. Evolution | Genetics and Evolution | 12 | Zoology | 2–4 Q | Using Hardy–Weinberg without checking its assumptions. |
| 26. Human Health and Disease | Biology and Human Welfare | 12 | Zoology | 3–4 Q | Matching a disease to the wrong pathogen or vector. |
| 27. Microbes in Human Welfare | Biology and Human Welfare | 12 | Botany | 1–2 Q | Learning microbe names without the product each one makes. |
| 28. Biotechnology: Principles and Processes | Biotechnology and its Applications | 12 | Zoology | 3–4 Q | Mixing up the order in which restriction enzymes, vectors and ligase are used. |
| 29. Biotechnology and its Applications | Biotechnology and its Applications | 12 | Zoology | 2–3 Q | Confusing Bt cry genes with the RNA interference examples. |
| 30. Organisms and Populations | Ecology and Environment | 12 | Botany | 2–3 Q | Swapping the exponential and logistic growth equations and their symbols. |
| 31. Ecosystem | Ecology and Environment | 12 | Botany | 2–3 Q | Inverting the pyramid of energy against those of number and biomass. |
| 32. Biodiversity and Conservation | Ecology and Environment | 12 | Botany | 2–3 Q | Quoting biodiversity figures without the NCERT context they come from. |
Ranges overlap and are rounded, so chapter ranges do not add up exactly to a unit or subject total. Counts shift by a question or two every year.
Partly. NTA splits the Biology half of the paper into Botany and Zoology sections of 45 questions each, so the split of the paper is official. Which chapter is taught under which heading is a coaching convention: the 32 NCERT chapters are usually divided about 17 to 15, and a chapter or two moves between them depending on the material you use. The official syllabus itself is organised by unit, not by Botany and Zoology, which is how the table above orders it.
It means the question is written from a specific sentence, table or diagram caption rather than from the idea in general. A question on the lac operon is rarely "explain regulation"; it is which state a named gene is in, in the words the textbook used.
So the useful unit of revision is the line, not the chapter. Read a page, close it, and say what the paragraph claimed — including the exceptions, which is where four-option questions are built. BrainStride maps a wrong Biology answer back to the NCERT paragraph the question came from, so revision points at a line rather than a chapter.
Not in the hard units. They leak in recall that was never checked: a hormone matched to the wrong gland, ploidy misplaced in the embryo sac, a pyramid inverted. Each is worth −1 on top of the +4 you did not get, so ten such slips is a 50-mark swing, and in a year like 2025 — when the topper scored 686 — that is thousands of ranks. The NEET cutoff page shows how sharply marks turn into ranks near the top.
Biology decides the rank more than any other subject because 360 of the 720 marks sit here and the questions are the most predictable. The NEET marks vs rank post shows what 600, 650 and 680 meant on the hard 2025 paper and the easier 2026 re-exam, and the NEET rank predictor gives the same band for any score. After the exam, the NEET score calculator scores a response sheet against the answer key with the +4 and −1 marking. Genetics and evolution is the Biology unit with the most calculation-style questions and has its own guide. For the rest of the paper, the NEET hub collects the pattern, the full syllabus and the dates, and the counselling guide explains what happens to the rank once the result is out.
Patterns our subject mentors see most often — illustrative, not measured. Sample observations; replace with measured data before launch.
Why it happens
Questions are written from captions, small tables and the exceptions printed beside them.The fix
Treat every table and labelled diagram as examinable text: cover it, recall it, then check it.Why it happens
Two statements both sound familiar, and familiarity is not the same as knowing which one NCERT made.The fix
Judge each statement separately as true or false before looking at the options, then match.Why it happens
Meiosis stages, immunity types and growth regulators are learned as clusters, not as distinctions.The fix
Write the pairs you confuse on one sheet with the single difference that separates them, and test that sheet weekly.Why it happens
Biology feels guessable, so a dozen guesses slip in — and −1 each turns a good paper into an average one.The fix
Rule out two options before answering. Below that, leave it blank and come back in the second pass.Why it happens
Plant Kingdom, Morphology and Anatomy are dry, so they get postponed past the point where revision is possible.The fix
Finish them early and revisit them on a schedule — together they are worth more than either Biotechnology unit (5–7 Q).Everything here is free and open — no sign-up needed for the tools.
Every solution is reviewed by a subject teacher before it ships, explanations are audited weekly, and a one-tap report sends any question straight to a mentor.
Read the editorial policyNEET UG Biology has 90 of the paper’s 180 questions and 360 of its 720 marks — half the paper — split into Botany and Zoology sections of 45 questions each. All questions are compulsory under the pattern used since 2025, with +4 for a correct answer and −1 for a wrong one. Biology is therefore where the rank is decided.
The NEET Biology syllabus covers 32 NCERT chapters grouped into 10 official units, from Diversity in Living World to Ecology and Environment. About 17 are usually taught as Botany and 15 as Zoology, though that split is a coaching convention rather than part of the official syllabus.
In recent NEET papers the heaviest units are Genetics and Evolution (10–14 Q), Human Physiology (8–12 Q), Cell Structure and Function (8–10 Q) and Ecology (6–9 Q). These are BrainStride’s analysis of past papers rather than official figures — NTA publishes no chapter weightage — so use them to order your revision, not to skip units.
For the syllabus, yes: almost every NEET Biology question traces back to an NCERT line, table or diagram. What NCERT does not give you is practice under time and negative marking, which is where scores are actually lost. Read NCERT actively, then test yourself on past-paper-style questions chapter by chapter.
Accuracy, not extra books. Above 320 of 360 means roughly 82 of 90 questions right with almost no wrong answers, so the work is eliminating careless losses: recall checked line by line, statement questions judged one statement at a time, and guesses restricted to questions where two options are already ruled out.
Study them in the order the syllabus units run, not as two subjects — units such as Reproduction and Genetics contain both. The Botany and Zoology labels matter on exam day, because the paper has a 45-question section for each, so practise in that format closer to the exam to get used to the switch.
Pattern and marking facts on this page follow the NEET UG pattern used since 2025. Confirm the 2027 details in the official bulletin when it is released.
Free guides, no account needed.
Twenty minutes of diagnostic answers that, chapter by chapter, and points each miss back to the NCERT line behind it.
Formulas, the mistakes that cost marks, worked examples and a quiz — free, no account.