NEET · Subject-wise preparation

NEET high weightage chapters, by subject and tier

By the PrepMatic team · Updated 8 Oct 2026 · 7 min read

NEET has no official chapter-wise weightage. NTA does not publish how many questions come from each unit, so every list of "high weightage chapters" is someone's analysis of past papers, including this one. The tiers below describe the broad pattern in recent papers: which units tend to be asked often, which sometimes, and which rarely. Use them to decide what to study first and in what depth, never to decide what to skip.

How to read these tiers

The paper has 180 questions spread over 50 NMC units (20 Physics, 20 Chemistry, 10 Biology), so the average Physics or Chemistry unit gets about two questions and the average Biology unit about nine. The tiers are relative to that average.

Three cautions apply to every table here.

• Unofficial and approximate. These are patterns, not counts. A unit marked High will not give the same number of questions every year, and the number varies between papers.
• Syllabus changes. The NMC syllabus replaced the old one from NEET 2024. When you look at papers from before that, ignore questions on topics that are no longer in the unit list (the NEET syllabus page lists what was dropped).
• The 2026 caveat. NEET 2026 was held twice: the 3 May 2026 paper was cancelled after a leak, and the valid paper was the 21 June 2026 re-examination. If you tally the 2026 paper, use the 21 June paper.

Physics: tiers by unit

The detailed approach, including formulas and common mistakes, is in NEET Physics preparation.

Chemistry: tiers by unit

See NEET Chemistry preparation for the physical, inorganic and organic split of study time.

Biology: tiers by unit

Biology has only 10 units for 90 questions, so even a Medium unit here carries several questions.

The study method for these is in NEET Biology preparation.

Using weightage without skipping chapters

Rule 1: High first, but depth over breadth

Cover High units early and deeply, since they repay both time and practice. Do not decide a High unit is "done" until past-paper questions on it come out right.

Rule 2: Low does not mean skip

A Low unit is where you pick up marks cheaply, since it is small and has a fixed style. Skipping it saves little time and gives away marks you could have won. Finish the Low units in a short block and revise them lightly.

Rule 3: Weightage multiplied by your accuracy is what you gain

A unit is worth working on when the potential marks are high and your current accuracy is low. Illustration: a unit that gives you three questions in a paper. If you get one right and two wrong, you score 4 − 2 = 2. If you get all three right, you score 12. Raising accuracy on that single unit is worth 10 marks. A High unit where you are already accurate gives less return than a Medium unit where you are guessing.

Build your own weightage sheet

Published tier lists copy each other. Making your own takes one afternoon and is more reliable for you.

1. Take the last four to six valid papers, using the sources and cautions in NEET previous year question papers.
2. For each question, write down the NMC unit it belongs to, ignoring questions on removed topics.
3. Count questions per unit in a spreadsheet and note the range across papers, not just the average.
4. Mark each unit High, Medium or Low relative to its subject, and compare it with the tiers above.
5. Where your sheet disagrees with this page, trust your sheet, because it is based on the papers in front of you.

Update the sheet when you have a new paper. Revisit it in your revision cycles and the last 60 days, as described in the NEET revision strategy.

How PrepMatic helps you apply tiers

PrepMatic's free assessment, about 15 untimed questions, shows your weakest and strongest subjects, which fills in the "accuracy" side of Rule 3 at subject level. It does not give chapter-level results, so keep an error log by unit as well. The study plan can then spread your exam date, daily hours and study days across topics. You can build custom mocks by choosing subjects, number of questions, duration and difficulty, or focus a mock on your weak subjects.

Frequently asked questions

Does NTA publish chapter-wise weightage for NEET?

No. NTA publishes the paper pattern and the NMC publishes the syllabus units, but neither publishes how many questions come from each unit. All weightage tables, including this one, are unofficial analyses of past papers.

Which chapters are most important in NEET Biology?

Human Physiology is among the largest units. Cell Structure and Function, Plant Physiology, Genetics and Evolution, Reproduction and Ecology also tend to be asked often. Even so, no Biology unit should be skipped, because Biology is half the paper.

Can I skip low weightage chapters?

It is risky and usually not worth it. Low units are small and have a predictable style, so they are cheap to prepare. Skipping them hands away marks that you could win in a short block.

How many questions come from Class 11 and how many from Class 12?

The NMC lists units, not classes, and NEET draws on both years of NCERT. Treat both as equally necessary, and note that any ratio you read depends on which chapters the author assigns to each class.

Do weightage patterns change every year?

Yes. Units move between tiers from one paper to the next, and a change in syllabus or paper style shifts them further. Use tiers to set an order of study and your own tally to check it.

Official sources

• National Medical Commission (NMC): the NEET-UG syllabus unit list.
• NEET-UG official website (NTA): information bulletin, notices and answer keys.
• National Testing Agency notices: answer key and result notices.

These pages publish no unit-wise question counts. Confirm syllabus and pattern in the latest notifications. For the full exam, return to the NEET guide.

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