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NEET Biology Chapter-Wise Weightage 2025 by NTA - Class 11 & 12 Biology Chapter-wise Weightage

NEET Biology Chapter-Wise Weightage 2025 by NTA - Class 11 & 12 Biology Chapter-wise Weightage

Edited By Manisha Tiwari | Updated on Mar 25, 2025 06:36 PM IST | #NEET
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NEET Biology Chapter-Wise Weightage 2025 by NTA: Knowledge of chapter-wise weightage in NEET Biology is important for candidates planning to improve their preparation strategy in the year 2025. NEET is conducted by the National Testing Agency (NTA), and although the official detailed chapter-wise weightage is not given by them, information from credible sources will prove helpful.

This Story also Contains
  1. Biology Chapter wise Weightage for NEET
  2. Class 11 Biology chapter wise Weightage For NEET
  3. Biology NEET chapter-wise weightage for class 12
  4. NEET chapter-wise weightage for Botany
  5. Zoology chapter-wise weightage of NEET 2025
  6. NEET Biology Chapter-wise Weightage Following Previous Year’s Trends
NEET Biology Chapter-Wise Weightage 2025 by NTA  -  Class 11 & 12 Biology Chapter-wise Weightage
NEET Biology Chapter-Wise Weightage 2025 by NTA - Class 11 & 12 Biology Chapter-wise Weightage

Educational experts' analysis shows that certain chapters hold major weightage in NEET Biology. For example, Genetics and Evolution cover 18% of the questions, i.e., 8-9 questions in the exam. Human Physiology is equally important, being responsible for about 13% of the Biology section. Some important chapters are Ecology and Environment with a weightage of 10-16%, and Plant Physiology with 8-13%. Working hard on these high-yield topics will improve one's performance in the exam.

Background wave

It is important for candidates to use this chapter-wise weightage into their study schedules so that they have an evenly balanced approach covering both high-weightage and core topics. Practice on a regular basis, added with mock tests, can also help in learning and improving time management capabilities, which are important to pass NEET 2025.

Biology Chapter wise Weightage for NEET

NEET biology syllabus is divided into two parts: Zoology and Botany. An in-depth understanding of the NEET biology syllabus is crucial for aspiring medical students, as it forms a significant portion of the overall examination, determining their eligibility for admission to undergraduate medical courses in India. Identifying the weightage of biology chapters in NEET enables aspirants to concentrate their efforts on these specific areas, facilitating a strategic and targeted approach to their studies. The tables below present the chapter wise weightage for NEET Biology subject, providing candidates with valuable insights for a more focused and efficient preparation.

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Class 11 Biology chapter wise Weightage For NEET

The table given below gives insights into the weightage of biology chapters in NEET, providing valuable information for aspiring candidates.

Biology Chapter wise Weightage For NEET Class 11

The data below shows the NEET 2025 most important chapters in the Biology section from class 11.

Unit

Topic / Chapters

Biology class 11 chapter-wise weightage*

I

Diversity of Living Organisms

14%

The Living World

Biological Classification

Plant Kingdom

Animal Kingdom

II

Structural Organisation in Plants & Animals

5%

Morphology of Flowering Plants

Anatomy of Flowering Plants

Structural Organisation in Animals

III

Cell: Structure and Function

9%

Cell-The Unit of Life

Biomolecules

Cell Cycle and Cell Division

IV

Plant Physiology

6%

Transport in Plants

Mineral Nutrition

Photosynthesis in Higher Plants

Respiration in Plants

Plant - Growth and Development

V

Human Physiology

20%

Digestion and Absorption

Breathing and Exchange of Gases

Body Fluids and Circulation

Excretory Products and Their Elimination

Locomotion and Movement

Neural Control and Coordination

Chemical Coordination and Integration

*Approximate weightage; based on previous year exams’ and experts’ analysis.

Biology NEET chapter-wise weightage for class 12

The Biology chapters from class 12 carry substantial weight in the NEET Exam. Proficiency in mastering the chapter wise weightage for NEET Biology establishes a good base and also increases problem-solving skills. Refer to the table below to learn about the chapters of Biology with the highest biology NEET weightage in class 12.

Class 12 Biology NEET weightage 2025

Based on the previous years' analysis, the table below indicates the weightage of important chapters for the NEET Exam from class 12 Biology.

Unit

Topic / Chapters

Class 12 Biology chapter-wise Weightage*

VI

Reproduction

9%

Reproduction in Organisms

Sexual Reproduction in Flowering Plants

Human Reproduction

Reproductive Health

VII

Genetics and Evolution

18%

Principles of Inheritance and Variation

Molecular Basis of Inheritance

Evolution

VIII

Biology and Human Welfare

9%

Human Health and Diseases

Strategies for Enhancement in Food Production

Microbes in Human Welfare

IX

Biotechnology and its Applications

4%

Biotechnology - Principles and Processes

Biotechnology and its Application

X

Ecology and Environment

6%

Organisms and Populations

Ecosystem

Biodiversity and its Conservation

Environmental Issues

*Approximate weightage; based on previous year exams’ and experts’ analysis.

NEET chapter-wise weightage for Botany

In the NEET Biology Syllabus, Zoology and Botany have an equal contribution. The detailed analysis of biology chapter-wise weightage for NEET further reflects the chapters that are more likely to be questioned in Botany. This provides a detailed breakdown to candidates on the chapter wise weightage for NEET biology, helping in their preparation.

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Zoology chapter-wise weightage of NEET 2025

The Zoology chapter-wise weightage for NEET 2025 is helpful for aspiring candidates to understand the topic better that they would need to focus more on to perform in the exam.

Topics

No. of Ques.

Animal Kingdom

4

Cockroach

2

Structural Organisation In Animals (Animal Tissue)

2

Digestion And Absorption (Digestive System)

2

Breathing And Exchange of Gases (respiratory System)

1

Body Fluids And Circulation (Circulatory System)

2

Locomotion And Movement (Muscles, Skeletal System)

2

Neural Control And Co-ordination (Nervous System, Sensory Organs)

2

Chemical Co-ordination and Integration (Endocrine System)

2

Excretory Products And Their Elimination (Excretory System)

2

Human Reproduction

3

Reproductive Health

3

Evolution

1

Human Health and Disease

3

Strategies for Enhancement in Food Production (Animal Breeding)

1

Cell: The Unit of Life

2

Cell Cycle and Cell Division

2

Biomolecules

1

Principles of Inheritance and Variation

2

Molecular Basis of Inheritance

4

Biotechnology Principles and Processes

1

Biotechnology and its Applications

1

Organisms and Populations

2

Environmental Issues

2

Total No. of Questions

50


NEET Biology Chapter-wise Weightage Following Previous Year’s Trends

Understanding the biology chapter-wise weightage for NEET as per the previous year's trends will help them to know the effective way of exam preparation. By making an analysis of the chapter-wise weightage for NEET Biology, the students shall be able to identify the topics that are consistently asked in the exams and on which they should focus during the study sessions. By targeting the high weightage of biology chapters in NEET, students can increase their score improving their overall performance in the exam.


Also Read:

Frequently Asked Questions (FAQs)

1. What is the total marks of NEET Biology 2025?

There will be a total of 90 questions asked from the Biology section of NEET. The total marks for the Biology section is 360 marks.

2. Where can I download the official NEET Biology weightage PDF?

The NTA (National Testing Agency) releases the official NEET syllabus and weightage details on its website (neet.nta.nic.in). Various educational platforms also provide chapter-wise weightage PDFs.

3. Which chapters have the highest weightage in NEET Biology 2025?

Chapters like Human Physiology, Genetics & Evolution, Ecology, and Biotechnology have the highest weightage in NEET Biology. These topics require extra focus during preparation.

4. How can I use NEET Biology weightage to improve my score?

Focus on high-weightage topics first. Revise NCERT thoroughly, practice previous years' papers, and take mock tests to strengthen weak areas and maximize scores.

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Questions related to NEET

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To improve your marks in NEET mock tests,

Analyze your performance

Identify weak areas

Focus on strengthening those areas by revising concepts, solving problems, and practicing regularly with mock tests and previous years' papers

Doubt solving

Repeated evaluation

Make a mistake copy

You can download paid mock tests by paying nominal fee at the leading coaching institutes like Allen, Aakash , PW

You can download them for free here too

https://medicine.careers360.com/user/update-profile?destination=https://medicine.careers360.com/download/ebooks/neet-ug-2024-free-mock-test

Mock tests help in simulation of real neet so you should keep in mind the following points

Should be ncert based

Should have time stamps

Should have detailed solutions

The leading coaching institutes like Allen, Aakash,PW provides the best mock papers to make candidate neet ready. You can take their mock tests by paying a nominal fee.

Otherwise you can also check these too https://medicine.careers360.com/download/ebooks/neet-ug-2024-free-mock-test

No you are eligible only for the Delhi counselling since you have completed 11th and 12th from Delhi and your father being in the army you will get reservation under CW quota in Indraprastha University counseling for MBBS.

You will get only one domicile otherwise.

Neet has made several amendments in Neet syllabus from 2023 onwards implementing NEP 2020. A considerable number of chapters have been removed from the 3 subjects with more being in the Chemistry.

Check here for deleted chapters and upgraded syllabus: https://medicine.careers360.com/articles/neet-deleted-syllabus-2025

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Column I ( Salivary gland)

 

Column II ( Their location)

Parotids

I

Below tongue

Sub-maxillary / sub-mandibular

Ii

Lower jaw

Sub-linguals

Iii

Cheek

Option: 1

a(i), b(ii) , c(iii)

 


Option: 2

a(ii), b(i), c(iii)

 


Option: 3

a(i), b(iii), c(ii)


Option: 4

a(iii), b(ii), c(i)


Ethyl \; ester \xrightarrow[(excess)]{CH_{3}MgBr} P

the product 'P' will be ,

Option: 1


Option: 2


Option: 3

\left ( C_{2}H_{5} \right )_{3} - C- OH


Option: 4


 

    

           

 Valve name                            

             

Function

    I   Aortic valve     A

Prevents blood from going backward from the pulmonary artery to the right ventricle.

    II   Mitral valve     B

 Prevent blood from flowing backward from the right ventricle to the right atrium.

    III   Pulmonic valve     C

 Prevents backward flow from the aorta into the left ventricle.

    IV   Tricuspid valve     D

 Prevent backward flow from the left ventricle to the left atrium.

 

Option: 1

I – A , II – B, III – C, IV – D


Option: 2

 I – B , II – C , III – A , IV – D


Option: 3

 I – C , II – D , III – A , IV – B


Option: 4

 I – D , II – A , III – B , IV – C 

 

 


Column A Column B
A

a) Organisation of cellular contents and further cell growth.  

B

b) Leads to formation of two daughter cells.

C

c) Cell grows physically and increase volume proteins,organells.

D

d)  synthesis and replication of DNA.

Match the correct option as per the process shown in the diagram. 

 

 

 

Option: 1

1-b,2-a,3-d,4-c
 


Option: 2

1-c,2-b,3-a,4-d


Option: 3

1-a,2-d,3-c,4-b

 


Option: 4

1-c,2-d,3-a,4-b


0.014 Kg of N2 gas at 27 0C is kept in a closed vessel. How much heat is required to double the rms speed of the N2 molecules?

Option: 1

3000 cal


Option: 2

2250 cal


Option: 3

2500 cal


Option: 4

3500 cal


0.16 g of dibasic acid required 25 ml of decinormal NaOH solution for complete neutralisation. The modecular weight of the acid will be

Option: 1

32


Option: 2

64


Option: 3

128


Option: 4

256


0.5 F of electricity is passed through 500 mL of copper sulphate solution. The amount of copper (in g) which can be deposited will be:

Option: 1

31.75


Option: 2

15.8


Option: 3

47.4


Option: 4

63.5


0.5 g of an organic substance was kjeldahlised and the ammonia released was neutralised by 100 ml 0.1 M HCl. Percentage of nitrogen in the compound is

Option: 1

14


Option: 2

42


Option: 3

28


Option: 4

72


0xone is

Option: 1

\mathrm{KO}_{2}


Option: 2

\mathrm{Na}_{2} \mathrm{O}_{2}


Option: 3

\mathrm{Li}_{2} \mathrm{O}


Option: 4

\mathrm{CaO}


(1) A substance  known as "Smack"

(2) Diacetylmorphine

(3) Possessing a white color

(4) Devoid of any odor

(5) Crystal compound with a bitter taste

(6) Obtained by extracting from the latex of the poppy plant

The above statements/information are correct for:

Option: 1

Morphine


Option: 2

Heroin


Option: 3

Cocaine


Option: 4

Barbiturates


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