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Do or Die Chapters in Biology for NEET 2026: Important Biology Topics

Do or Die Chapters in Biology for NEET 2026: Important Biology Topics

#NEET
Irshad AnwarUpdated on 08 Oct 2025, 01:02 PM IST

Biology is the most important subject for NEET 2026, as it carries 90 marks out of 180. Experts highlight the do or die chapters in Biology for NEET 2026 that give maximum weightage. Not all chapters are equal - some are high scoring and repeat often in exams. By focusing on the important Biology chapters for NEET 2026, students can save time and get more marks.

This Story also Contains

  1. NEET Biology Weightage 2026
  2. Which are the Do or Die Chapters in Biology for NEET 2026?
  3. NEET 2026 Biology Chapter-Wise Weightage
  4. How to Prepare the Do or Die Chapters in Biology for NEET 2026
  5. Tips to Revise Do or Die Biology Chapters Before NEET 2026 Exam
Do or Die Chapters in Biology for NEET 2026: Important Biology Topics
Do or Die Chapters in Biology for NEET 2026

This article is based on the previous year's analysis of NEET chapter-wise weightage. Students can check the most important Biology chapters for NEET 2026 along with NCERT focus points, revision tips and a quick checklist. With clear weightage tables and strategies, these do or die Biology chapters for the NEET exam can help every aspirant improve their Biology score.

NEET Biology Weightage 2026

NEET Biology carries maximum weightage. NEET Biology weightage can also be seen as it covers 90 questions and the total number of questions in the examination is 180. NEET Biology also consists of two sections: Botany and Zoology. The chapters of both sections are divided into both classes syllabus that is class 11th and 12th.

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Which are the Do or Die Chapters in Biology for NEET 2026?

NEET 2026 aspirants wish to find out the do or die chapters of Biology. These are the NEET highest weightage chapters in biology and most frequently asked in the exam. By studying these key Biology chapters for NEET 2026, candidates can attempt most questions in less time. Experts and toppers advise that it is the best idea to practise 100 most important NEET Biology questions to get 330+ marks.

List of Do or Die Biology Chapters for NEET 2026

Here are the most important Biology chapters for NEET 2026 that should be on every student’s priority list:

NCERT Biology Class 11

NCERT Biology Class 12

The Living World

Sexual Reproduction In Flowering Plants

Plant Kingdom

Human Reproduction

Morphology of Flowering Plants

Reproductive Health

Structural Organisation in Animals

Principles of Inheritance and Variation

Cell: The Unit of Life

Molecular Basis of Inheritance

Transport in Plants

Evolution

Photosynthesis in Higher Plants

Human Health and Disease

Plant Growth and Development

Microbes in Human Welfare

Body Fluids and Circulation

Biotechnology: Principles and Processes

Locomotion and Movement

Biotechnology and its Applications

Chemical Coordination and Integration

Organisms and Populations

Biological Classification

Ecosystem

Animal Kingdom

Biodiversity and Conservation

Anatomy of Flowering Plants


Biomolecules


Cell Cycle and Cell Division


Respiration in Plants


Breathing and Exchange of Gases


Excretory Products and Their Elimination


Neural Control and Coordination


NEET 2026 Biology Chapter-Wise Weightage

The table below shows the NEET biology chapter-wise weightage 2026 based on the previous year's analysis:

The data is from the past 5 years, and the chapters transport in plants, strategies for enhancement in food production, digestion and absorption, reproduction in organisms and mineral nutrition are not a part of the syllabus now.

Chapters20212022202320242025

Weightage (%)

Ecosystem342153.30%
Morphology of Flowering Plants413533.52%
Biotechnology: Principles & Processes865746.60%
Anatomy of Flowering Plants333423.30%
Plant Growth and Development122211.76%
Sexual Reproduction in Flowering Plants863234.84%
Cell Cycle and Cell Division566504.84%
Cell: The Unit of Life332433.30%
Organisms & Populations434223.30%
Principles of Inheritance & Variation245654.84%
Evolution322412.64%
Biotechnology & Its Applications342233.08%
Biomolecules333564.40%
Human Reproduction343474.62%
Human Health and Disease444475.06%
Molecular Basis of Inheritance1197678.79%
Structural Organisation in Animals545234.18%
Transport in Plants113001.10%
Photosynthesis in Higher Plants223322.64%
Biological Classification220211.54%
Strategies for Enhancement in Food Production131001.10%
Microbes in Human Welfare221142.20%
Respiration in Plants112201.32%
Animal Kingdom544665.49%
Reproductive Health422202.20%
Digestion and Absorption322001.54%
Chemical Coordination and Integration102462.86%
Breathing and Exchange of Gases331201.98%
Environmental Issues114001.32%
Locomotion and Movement132201.76%
Plant Kingdom033162.86%
Reproduction in Organisms010000.22%
Body Fluids & Circulation021201.10%
Biodiversity and Conservation002521.98%
Mineral Nutrition002000.44%
Neural Control and Coordination002100.66%
Excretory Products and Elimination002211.10%
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How to Prepare the Do or Die Chapters in Biology for NEET 2026

Knowing the do or die chapters in Biology for NEET 2026 is only the first step. The next step is preparing them smartly. Since Biology covers 90 questions in NEET, even a correct answer can improve your rank. Here is the best way to prepare for the important Biology chapters for NEET 2026.

Focus on NCERT First

  • Every question in NEET Biology is based on the NCERT. Read every line of the NCERT textbooks for Class 11 and 12. Highlight diagrams, flowcharts, and definitions.

  • Pay extra attention to chapters like Human Physiology, Genetics, and Ecology, as many direct questions are framed from the NCERT.

Practice Previous Year Questions (PYQs)

  • Solve at least the last 10 years of NEET PYQs. Many questions repeat with slight variations, especially in Genetics, Ecology, and Human Physiology.

  • Practising NEET question paper shows you the exact type of questions asked from these do or die Biology chapters.

Make Short Notes & Flowcharts

  • Prepare short notes for every high-weightage chapter.

  • Use flowcharts for processes like photosynthesis, respiration, DNA replication, and hormonal coordination.

  • Keep these notes handy for last-minute revision before NEET 2026.

Revise High-Weightage Topics Weekly

  • Schedule a weekly revision for the top 5 units - human physiology, genetics, ecology, diversity, and reproduction.

  • Regular revision prevents forgetting and improves accuracy during the exam.

Attempt Mock Tests in Exam Conditions

  • After finishing each chapter, attempt topic-wise NEET mock tests. Then move to a full-length Biology mock test under timed conditions.

  • This helps identify weak areas within the important Biology chapters for NEET 2026 and builds exam stamina.

NEET Syllabus: Subjects & Chapters
Select your preferred subject to view the chapters

Tips to Revise Do or Die Biology Chapters Before NEET 2026 Exam

Revision is the key to scoring well in NEET. Smart revision planning ensures remembering facts, diagrams, and NCERT information that get asked in the exam regularly. These are the effective methods by which one can revise the key Biology chapters for NEET 2026 in the last weeks.

Prioritise NCERT Diagrams and Tables

The majority of NEET Biology questions are based directly on NCERT tables and important biology diagrams for NEET. Revise all labelled diagrams of chapters, such as human physiology, plant physiology, and cell structure.

Use a One-Page Revision Sheet

Prepare or download a one-page revision note sheet for every high-weightage chapter. For example, describe human physiology processes, genetic laws, and ecological cycles on one sheet. This will make the last-day revision quick and easy.

Revise PYQ Errors First

Read the questions that you answered incorrectly while doing PYQs or mock tests. Highlight them and review the very concepts again. These weak spots are most likely to determine your final NEET Biology score.

Practice Quick Recall Sessions

In the final two weeks, practice quick recall sessions - choose any chapter such as Reproduction or Genetics and attempt to recall processes, definitions, and examples without reference to notes. This active recall technique enhances memory retention.

Observe the 3-2-1 Rule in the Final Week

  • 3 Days Before Exam – Practice only the highest 5 chapters: Human Physiology, Genetics, Ecology, Reproduction, and Diversity.

  • 2 Days Before Exam – Practice from NCERT diagrams, examples, and tables.

  • 1 Day Before Exam – Don't read new things. Just go through one-page notes and calm your mind.

Stay consistent, revise NCERT daily, and focus on these do or die Biology chapters for NEET 2026. With smart preparation and regular practice, these chapters can be your game-changer and help you secure your dream medical seat.

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Good Morning, Aspirant,

Preparing for both NEET and JEE entrance exams at the same time would be challenging but possible. AS physics and chemistry are both subjects common to both exams. Students need to balance math and biology. A proper timetable can help you manage time and prepare for the exam without stress. You can register for the mock test for JEE students, conducted by Creers360. Giving a mock test can help you analyse your in-depth performance. The last date of registration on 8th January. The link to the mock test is attached herewith.


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Preparing for both NEET and JEE together is possible, but honestly, very tough.
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Both exams have very different styles and expectations.
Only students with very strong basics and high discipline can manage both well.

If you are an average student, it’s better to choose one exam and focus fully on it. These are my honest advise to you, you can prepare for one exam and crack that exam, the future opportunities are many in JEE and NEET.

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odisha pg neet registration for round 2

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Here is your Odisha NEET PG Admission 2025 - Counselling, Round 2 Choice Filling (Dec 18), Seat Allotment. I am providing you the link. Kindly open and check it out.

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I had done my 12th in 2021 in science bio stream. Then i had taken 2 drops to prepare for neet i didn't got selected and then i had joined for online bca in 2023 from university of mysore. And now i am planning to do mca regular so which college would be better private and government both.

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Your plan to shift from online BCA to regular MCA is completely valid and acceptable. The gap years taken for NEET preparation will not affect MCA admission.
You should first try government colleges through exams like NIMCET or CUET-PG for better fees and placements. Top options include NITs, University of Hyderabad, JNU, and Delhi University.
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