NEET Biology Chapter Wise Weightage 2026: Analysis & Important Topics

To crack the National Eligibility cum Entrance Test (NEET), Biology is your most critical subject. Accounting for 50% of the total marks (360 out of 720), mastering the NEET Biology chapter wise weightage is the secret to prioritizing your study time and securing a seat in a top medical college.

At NEET Online Coaching, we have analyzed the last 5 years of NTA question papers to bring you the most accurate weightage breakdown for Botany and Zoology.

Why Understanding Chapter-Wise Weightage is Crucial

With a vast syllabus covering 38 chapters across Class 11 and 12, trying to give equal time to every topic is inefficient. By focusing on high-weightage chapters, you can:

Maximize Marks: Focus on the 20% of the syllabus that often yields 80% of the questions.
Time Management: Allocate more hours to complex, high-scoring units like Genetics and Human Physiology.
Strategic Revision: Identify "easy-kill" chapters that offer direct marks with minimal effort.

NEET Biology Weightage: Unit-Wise Breakdown

The Biology section is divided into 10 units. Below is the approximate weightage based on recent exam trends.

High-Weightage Chapters: Your Top Priority

If you are starting your preparation or looking for a quick score boost, these chapters are non-negotiable.

1. Botany High-Yield Chapters

Molecular Basis of Inheritance (14%): The most important chapter. Focus on DNA replication, transcription, and translation.
Principles of Inheritance and Variation (10%): Understand Mendelian genetics and genetic disorders.
Cell Cycle and Cell Division (9%): A small but highly scoring chapter involving Mitosis and Meiosis.

2. Zoology High-Yield Chapters

Animal Kingdom (13%): Requires consistent revision of examples and phylum characteristics.
Biotechnology: Principles and Processes (12%): A modern favorite of the NTA. Master the tools of rDNA technology.
Human Reproduction (6%) & Reproductive Health (8%): Focus on hormonal cycles and contraceptive methods.

NEET Biology Chapter Wise Question Distribution (Last 5 Years)

Based on historical data, here is the average number of questions asked from specific chapters:

Class 11 Biology

Biological Classification: 2-3 Questions
Morphology of Flowering Plants: 3-4 Questions
Biomolecules: 3-4 Questions
Chemical Coordination and Integration: 2-3 Questions

Class 12 Biology

Human Health and Disease: 3 Questions
Evolution: 2-3 Questions
Microbes in Human Welfare: 1-2 Questions
Organisms and Populations: 3 Questions

Preparation Tips for NEET Biology

NCERT is Bible: 90-95% of questions are directly from NCERT lines. Read every "Summary" and "Supplementary Material."
Focus on Diagrams: Practice labeling for chapters like Human Reproduction and Morphology of Flowering Plants.
Solve PYQs: Solve at least the last 10 years of NEET papers to understand the framing of questions.
Flashcards for Examples: Use flashcards for the Animal Kingdom and Plant Kingdom to memorize scientific names.

Frequently Asked Questions (FAQs)

Q1: Which chapter has the highest weightage in NEET Biology?

Molecular Basis of Inheritance consistently carries the highest weightage, often featuring 6–9 questions in a single exam.

Q2: Is Human Physiology more important than Plant Physiology?

Statistically, yes. Human Physiology usually accounts for 15-18% of the paper, while Plant Physiology covers about 6-8%.

Q3: Can I skip low-weightage chapters?

We don't recommend skipping any chapter if you aim for 650+ marks. However, you can prioritize high-weightage topics during your first phase of study.

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NEET Biology High Weightage Strategy This video provides a deep-dive analysis of recent paper trends to help you identify the most scoring sections for your upcoming exam.