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Do or Die Chapters in Biology for NEET 2025: Important Biology Chapters

Do or Die Chapters in Biology for NEET 2025: Important Biology Chapters

Edited By Irshad Anwar | Updated on Mar 05, 2025 09:19 PM IST | #NEET
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NEET  Admit Card Date : 01 May' 2025 - 01 May' 2025

Do or Die Chapters in Biology for NEET 2025: Are you ready to transform your NEET 2025 Biology preparation but feel overwhelmed by the vast Biology syllabus? Focusing on the 'Do or Die Chapters' is your secret weapon to score top marks. Lets dive deep into the most scoring topics—such as Human Physiology, Genetics & Evolution, and Ecology—that NEET UG 2025 aspirants can't afford to ignore. With detailed analysis, exam-specific weightage, and expert study strategies, we’ll show you exactly how to prioritize your revision and maximize your NEET 2025 biology score. If you need a targeted strategy for last-minute prep, this strategy on do-or-die chapters in biology for NEET will empower you and transform your approach to NEET Biology. Find out the NEET important chapters biology 2025 and discover the game-changing insights that can set you apart on exam day!

This Story also Contains
  1. NEET Biology Weightage
  2. NEET Biology Syllabus Breakdown
  3. NEET 2025 Biology Preparation
  4. Most Important Topics of NEET Biology
  5. NEET 2025 Chapter - Wise Weightage
  6. NEET Exam Day Strategy For Biology
Do or Die Chapters in Biology for NEET 2025: Important Biology Chapters
Do or Die Chapters in Biology for NEET 2025: Important Biology Chapters

National Eligibility Cum Entrance Test is the exam which acts as a doorway to step inside the field of medicine in India. Out of 180 questions, 90 are asked from biology therefore it becomes very important to excel in this section to secure a good rank in the examination. NEET Biology syllabus breaks down into two sections which are class 11th and 12th Biology.

Background wave

NEET 2025 Biology preparation includes some do-or-die chapters for NEET Biology to score high in this section. Making notes and practising on problems will make the task easier.

NEET Biology Weightage

NEET Biology carries maximum weightage in the question paper of NEET 2025. 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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NEET Biology Syllabus Breakdown

NEET Biology syllabus breaks down into two parts which are class 11th Biology and class 12th Biology. Both sections have chapters on botany and Zoology. The entire syllabus is divided into 10 different units which have their weightage in the question paper. Each unit has its equally important chapters. The Most important topics for NEET Biology are from these chapters. Some of them are high-weightage biology topics for NEET which we will discuss below:

Unit

Weightage

Diversity of life

10%

Structural organisation

8%

Cell: The Unit of Life

9%

Plant physiology

11%

Human physiology

18%

Reproduction

11%

Genetics and evolution

14%

Biology in human welfare

8%

Biotechnology

9%

Ecology

12%

NEET 2025 Biology Preparation

Preparation for the NEET Biology exam is not an easy task but with the correct strategy and planning you can excel in this section of the NEET Question paper. The key point is to understand the importance of NCERT and the concepts in the units like genetics and plant physiology. You need to memorize different cycles which are discussed in different units.

There are some important chapters for NEET Biology which you can easily come to know after analysis of the previous year's questions. Three of these units are Human physiology, genetics evolution and ecology. These three units carry 30% of the entire section in NEET Biology.

There are also direct one-line questions from NCERT Biology of class 11th and 12th whereas application-based questions are also asked at the same time. Genetics and biotechnology are the units where you need to practice more questions to understand the concept of the unit. NEET Mock Tests can also help you to brush up on this section.

Most Important Topics of NEET Biology

There are almost 38 chapters in the NEET Biology Syllabus which consist of 10 units and these units are further divided into chapters. Each of these chapters has its different concepts and some of the procedures are important from an examination point of view. These are high-weightage biology topics for NEET 2025.


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This Pie- chart shows all the important topics from the syllabus of NEET Biology. These topics are from the entire NEET Biology syllabus and all units.

NEET 2025 Chapter - Wise Weightage

The syllabus of NEET Biology is vast and consists of several chapters. Knowing the importance of every chapter becomes important when the section carries 50% of the total marks in the examination. This helps in boosting your biology preparation for NEET 2025. Down below in the table, we have covered all the chapters along with their weightage in the NEET 2025 Examination.

These are some do-or-die chapters for NEET Biology. If you see the trend of the question paper then these are some of the fixed chapters from where a good amount of questions are every year. And to score higher you need to focus on these chapters as they cover major sections of the 90 questions asked in the Biology section.

NEET Exam Day Strategy For Biology

On the NEET exam day, your approach towards the question paper will also be one of the deciding factors for your rank. The results completely depend upon your dedication, preparation and practice during the few last months left for the exam. Some of the strategic points are discussed below:

  • Start attempting easy and direct questions which are from NCERT as they will save you time.

  • Avoid unnecessary guesswork.

  • You can use elimination techniques if you are sure of the options given in the question.

  • Go cross the biology section thrice in case you have missed out on any of the questions due to the temperament of the examination.

Most Scoring concepts for NEET
This ebook serves as a valuable study guide for NEET exams, specifically designed to assist students in light of recent changes and the removal of certain topics from the NEET exam.
Download EBook

Just by focusing on the important topics of the NEET Biology Syllabus, you can Excel 75% of the section. The remaining 25% still demands your dedication, time and practice.

Also read:

Most Scoring concepts For NEET (As Per Latest NTA Syllabus)

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NEET Mock Test Biology 2025

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Questions related to NEET

Have a question related to NEET ?

Dear aspirant !!

Hope you are doing well !!

To join CIT (Central Institute of Technology) or any other engineering institute, the marks and eligibility criteria usually depend on the specific course you're interested in and the entrance exam requirements.

Since you've mentioned completing your 12th class 2 years ago and spending the past 2 years preparing for the NEET exam, here's what you should know:

  1. For Engineering (CIT or similar institutes) : Most engineering institutes, including CIT, generally require JEE Main scores for admission to B.Tech programs. To be eligible for JEE, the typical requirements are:

    • 12th Marks : You should have passed your 12th exam with Physics, Chemistry, and Mathematics as core subjects, and generally, you need a minimum of 50% in these subjects combined. The exact percentage criteria can vary depending on the institution.
    • JEE Main Score : The JEE Main exam is typically the key criterion for admission to B.Tech courses, so you will need to appear for JEE Main and achieve a good score for admission.
  2. Age Limit : The age limit for JEE Main is generally 25 years for general category candidates (with relaxation for reserved categories). Since you've completed your 12th two years ago, you should be within the age limit, but it's good to confirm with the specific institute for any age-related conditions.

  3. NEET and Engineering : Since you prepared for NEET, it’s important to note that NEET is primarily for medical courses like MBBS, BDS, and related fields, so NEET scores are not relevant for engineering programs like B.Tech. However, if you are interested in medical engineering (like Biomedical Engineering), then NEET may have a partial relevance depending on the course and university.

Next Steps : You would likely need to appear for JEE Main if you haven't done so yet and meet the eligibility criteria for CIT or other engineering institutes.

It's also advisable to visit the official CIT website for the exact admission process and eligibility details. Let me know if you need further clarification or help!


Hello!!


The B.E./B.Tech program offered by CIT consists of 8 semesters (4 years) in duration.


A Pass in the HSC(Academic: both +1 and +2)or its equivalent with a minimum average percentage :


General Category 45 %


BC and BCM 40 %


MBC & DNC 40 %


SC/SCA/ST 40 %


A pass in any one of the HSC(Vocational Subject: both +1 and +2)as given below with any one of the Engineering related subjects namely Mathematics, Physics or Chemistry with minimum percentage as given below


General Category 45 %


BC and BCM 40 %


MBC & DNC 40 %


SC/SCA/ST 40 %





Dear

To join CII (Central Institute of Technology) or any other institute, the eligibility criteria generally depend on the entrance exams, such as JEE (Joint Entrance Examination) or other specific exams for the college you are interested in.

For CII or similar institutes, you would need to:

  1. Eligibility for JEE : Since you completed your 12th two years ago and have spent time preparing for NEET, if you are looking to join an engineering program, you would likely need to appear for the JEE Main and Advanced exams. Usually, for JEE eligibility, the candidates must have passed the 12th board exam with Physics, Chemistry, and Mathematics as core subjects.

  2. Age Limit : There are generally age restrictions for JEE, and candidates must be within a certain age limit (usually 25 years for general candidates, with a relaxation for reserved categories).

  3. Marks Requirement : For JEE Main, you typically need a minimum of 75% marks in your 12th board exam (or be in the top 20 percentile in your respective board exam) to be eligible for admission to NITs and other centrally funded institutions. The exact eligibility for specific colleges like CII will depend on their own guidelines.

  4. Valid NEET Scores : Since you spent two years preparing for NEET, if you are still interested in pursuing a medical field, NEET scores can be considered for admission to medical colleges, but for engineering or technology courses, NEET scores generally won’t be relevant unless you are looking for a course in Biomedical Engineering or a similar niche

Dear

The exact number of NEET aspirants in India who do not give the NEET exam due to age-related issues is not officially documented. However, this situation arises because the upper age limit for NEET has been a significant point of concern for many students. As per the official guidelines:

  1. Age Limit for NEET : The eligibility criteria for NEET state that candidates must be at least 17 years old by December 31 of the year of admission, and the upper age limit is 25 years (with a 5-year relaxation for SC/ST/OBC candidates).

  2. Impact of Age Limit : Many aspiring medical students, who may not fulfill the age requirement or who take time to prepare for the exam after completing their 12th grade, are often unable to appear for NEET. This has led to frustration among many students who wish to pursue a medical career but cannot due to age restrictions.

However, the number of students affected by this issue varies every year, and it would require data from the National Testing Agency (NTA) or specific surveys to determine a precise figure. If you’re concerned about age limits or looking for alternative routes to medical education, there are a few options, like exploring medical colleges abroad or looking into alternative fields within healthcare.

If you want to stay updated on any changes in NEET eligibility or age limits, keep an eye on official announcements from the NTA or relevant education authorities.

Hi Nahid, There's no upper age limit for NEET, no aspirants are ineligible due to age and forced to take a drop year. The only age requirement is a minimum of 17 years as of December 31st of the year of admission.

View All

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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