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NEET 2021 Biology Exam Pattern, Marking Scheme, Weightage, Paper Analysis

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Nikkil Visha

Exams Prep Master | Updated On -Jun 16, 2021

NEET 2021 Biology Exam Pattern will be announced soon at the official website of NTA. Based on previous year’s exam pattern, NEET Biology will have 90 objective type questions i.e. 45 questions each from Botany and Zoology. Check NEET Biology Syllabus 

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Also, 4 marks will be awarded for each correct answer whereas, 1 mark will be deducted for each incorrect answer. Aspirants will be given an OMR sheet to mark their responses. NEET 2021 will be conducted in 11 languages, candidates can choose any language as per their preference. Read More

NEET Latest Updates:

  • ​June 8: Candidates planning to appear for NEET 2021 can download the language-wise NEET question paper. Click Here
  • June 1: NEET Biology paper holds 50% weightage in paper and with the right preparation candidates can score around 300+ marks in the subject. Read More

NEET 2021 will be conducted in offline mode consisting of 180 objective type questions to be attempted in 3 hours. In order to have good preparation and score well in the entrance examination, aspirants must be aware of NEET Syllabus and paper pattern. Read the article to know about the detailed exam pattern of NEET Biology, marking scheme, medium, chapter-wise weightage, etc.

NEET Biology 2021 Exam Pattern Highlights



Mode of the Exam


Total Time Duration 

3 Hours

Number of Questions

90 Questions (45 Questions each in Zoology and Botany)


English, Hindi, Marathi, Bengali, Tamil, Telugu, Gujarati, Kannada, Oriya, Assamese and Urdu 

Marking Scheme

+4 for each correct answer

-1 for incorrect answer

Must Read:

NEET Biology Exam Pattern

NEET Biology 2021 Exam Pattern

Time duration: 

  • NEET Biology is a 3 hour long pen & paper based(offline) test.

Total Marks:

  • The Total Marks in NEET Biology are 360 (180 marks each in Botany and Zoology) and the total number of questions is 90.

Type of Questions:

  • NEET Biology will consist of Objective type or Multiple Choice Questions.

  • It carries 4 marks each in Zoology and Botany both the subjects. Every question will have 4 choices out of which only 1 option will be the correct answer.

Medium of Question Paper:

NEET 2021 will be conducted in 11 different languages. As per the preference of the candidate, he/she can opt for any of the following languages mentioned below:

Medium of the exam

Exam Centre


All exam cities/centres


Available only in exam centres in Tamil Nadu


Available only in exam centres in Karnataka


Available only in exam centres in Gujarat, Daman, Dadra and Nagar Haveli


Available only in exam centres in Maharashtra


Available only in exam centres in Assam


All exam cities/centres


Available only in exam centres in Andhra Pradesh and Telangana


Available only in exam centres in Orissa

English and Urdu

Available only in exam centres 


Available only in exam centres in West Bengal

NEET Biology Marking Scheme

Marking Scheme for NEET Biology

  • Each correct answer will be given four marks.

  • One mark will be deducted for every incorrect response

  • Zero mark will be deducted for unattempted questions

  • Questions that have two or more responses marked in the OMR sheet will be considered as incorrect and negative marking will be applicable.


Total Marks

Number of questions

Marking Scheme




  • +4 marks will be awarded for each correct response

  • -1 mark will be deducted for each incorrect response







NEET Biology Important Topics

Important Topics for NEET Biology

  • Zoology is also known as Animal Biology which is the most interesting yet complicated subject of NEET Syllabus. It majorly deals with Animal Kingdom including the structures, embryology, habits, classification, and distribution of both animals-living and extinct.
  • Botany is also known as Plant Science or Phytology which is the crucial part of NEET Biology & Science of Plant Life. It also includes the study of Fungi and Algae. A person who has a specialisation in the field of plant study is known as Botanist or Plant Scientist.

Candidates can refer to the below mention important topics for Botany and Zoology both:

In Zoology

  • Evolution

  • Animal Husbandry

  • Cockroach

  • Animal Diversity

  • Human Reproduction

  • Animal Diversity

  • Human Health and Disease

  • Animal Tissue

  • Human Physiology

In Botany

  • Plant Reproduction

  • Biomolecules

  • Ecology

  • Genetics

  • Biology in Human Welfare

  • Plant Physiology

  • Cell Biology & Cell Division

  • Plant Morphology

  • Plant Anatomy

Chapter-wise Weightage of Syllabus

NEET 2021 Biology- Chapter-wise Weightage

As per the previous year trends, candidates can refer to the Biology chapter-wise weightage tabulated below:

Botany Subject

Topics of Class 11th

Number of expected questions

Topics of Class 12th

Number of Expected questions

Living World


Reproduction in Organisms


Biological Classification


Sexual Reproduction in Flowering Plants


Plant Kingdom


Principles Inheritance and Variation


Morphology of Flowering Plants


Molecular Basis of Inheritance


Anatomy of Flowering Plants


Microbes in Human Welfare


Cell-The Unit of Life


Strategies for Enhancement in Food Production


Cell Cycle and Cell division


Organisms and Populations


Transport in Plants




Mineral Nutrition

Biodiversity and Conservation


Photosynthesis in Higher Plants

Environmental Issues


Respiration in Plants

Plant Growth and Development

Zoology Subject

Topics of class 11th

Number of expected questions

Topics of class 12th

Number of expected questions

Animal Kingdom


Human Reproduction


Structural Organisation in Animals


Reproductive Health


Digestion and Absorption




Breathing and Exchange of Gases

Human Health and Disease


Body Fluids and Circulation



Excretory Products and their Elimination

Biotechnology Principles and Process


Locomotion and Movement

Biotechnology and its Application


Neural Control and Coordination

Chemical Coordination And Integration

NEET Biology Paper Analysis

Paper Analysis for NEET Biology

According to the candidates in the past have reported biology to be easier as compared to other two subjects. In this subject, there will be 45 questions each from zoology and botany both. Analysis of NEET Paper Pattern reveals questions tend to be equally distributed from Class XIth and XIIth. The majority of questions that appear are similar to the ones there is NCERT, so NEET aspirants are advised to refer to NCERT Books more often.

  • Zoology comprises 45 questions in the entrance exam and amongst those, most of the questions are easy and moderate to attempt. According to the experts, considering the difficulty level, almost 35% questions with high difficulty level & 15% questions with an easy level.
  • Human Physiology is one of the most important topics along with genetics amongst all. Both of these sections account for about 30 questions in the biology section. 
  • Botany mainly consists of 50% questions of average difficulty level wherein, 35% questions are of high difficulty level and 15% questions are of an easy level. On the other hand, major topics like Genetics & Biotechnology carry high weightage followed by Ecology in NEET Exam.

Previous Year Distribution of Questions from Botany Section

Difficulty Level/ Topic Cell & Cell Cycle Diversity of Life Plant Physiology Structural Organisation of
Biology in Human
Ecology Reproduction & Sexual
Easy 1 1 3 3 0 2 1 2 13
Medium 1 3 2 0 1 2 1 1 11
Difficult 4 1 4 2 1 3 0 4 19
Total 6 5 9 5 2 7 2 7 43

Previous Year Distribution of Questions from Zoology Section 

Difficulty Level/ Topic Animal Kingdom Human Physiology Biomolecules Structural Organisation in Animals Animal Husbandary & Biotechnology Evolution: Theories & Evidences Human Health & Diseases Human Reproduction & Reproductive Health
Easy 2 1 3 1 3 3 0 0 13
Medium 2 7 2 0 4 0 3 2 20
Difficult 1 4 1 1 3 1 1 2 14
Total 5 12 6 2 10 4 4 4 47

Sample Questions from NEET Biology Topics

 Ques. Which of the following is a defining characteristic of living Organisms?

  1. Growth

  2. Ability to make sound

  3. Reproduction

  4. Response to external stimuli

Answer: (D) Response to external stimuli

Ques. A Dikaryon is formed when

  1. Meiosis is arrested

  2. The two haploid cells do not fuse immediately

  3. Cytoplasm does not fuse

  4. None of the above

Answer: (B) The two haploid cells do not fuse immediately

Ques. Holdfast, stipe and frond constitutes the plant body in case of

  1. Rhodophyceae

  2. Chlorophyceae

  3. Phaeophyceae

  4. All of the above

Answer: (C)Phaeophyceae

Ques. Which one of the following statements is incorrect?

  1. Mesoglea is present in between ectoderm and endoderm in Obelia

  2. Asterias exhibits radial symmetry

  3. Fasciola is a pseudocoelomate animal

  4. Taenia is a triploblastic animal

Answer: (C) Fasciola is a pseudocoelomate animal

Ques. Given below are types of cells present in some animals. Which of the following cells can differentiate to perform different functions?

  1. Choanocytes

  2. Interstitial Cells

  3. Gastrodermal Cells

  4. Nematocysts

Answer: (B) Interstitial Cells

Ques. ABA acts antagonistic to

  1. Ethylene

  2. Cytokinin

  3. Gibberellic acid

  4. IAA

Answer: (C) Gibberellic acid

Ques. A person suffers punctures in his chest cavity in an accident, without any damage to the lungs its effect could be

  1. Reduced breathing rate

  2. Rapid increase in breathing rate

  3. No change in respiration rate

  4. Cessation of breathing

Answer: (D) Cessation of breathing

Ques. Mark the incorrect statement in context to O2 binding to Hb

  1. Higher pH

  2. Lower Temperature

  3. Lower pCO2

  4. Higher pO2

Answer: (A) Higher pH

Ques. CO2 dissociates from caramino-haemoglobin when

  1. pCO2 is high and pCO2 is low

  2. pO2 is high and pCO2 is low

  3. pCO2 and pO2 are equal

  4. None of the above

Answer: (B) pO2 is high and pCO2 is low

Download NEET Practice Papers

Points to remember while marking the OMR sheet

Candidates must check the below mentioned points before filling the OMR sheet for NEET 2021

  • Responses have to be marked using a ballpoint pen which will be provided in the examination hall.

  • Changing of answers on the OMR sheet is not allowed.

  • Erasing any information printed on the OMR sheet is a punishable offence.

  • Rough work should be done on the test booklet provided by the examiner.

  • A candidate must not forget to mark the test booklet code on the OMR sheet.

Important Instructions for candidates

  • NEET Admit Card must be brought to the examination centre for verification with a minimum of one original and valid photo identification proof (Aadhar Card, Passport, College ID, PAN Card, Driver’s License, Voter ID, or Employer ID).

  • Beverages and eatables will not be allowed inside the examination hall. Those aspirants who suffer from a medical condition were allowed to carry medicine.

  • NEET Admit Card will be considered valid only if the candidate’s signature and photograph are clearly visible.

  • Candidates must report to the venue of examination 60 minutes before the scheduled time of examination.

  • Candidates will be allowed to take the exam only if their credentials get verified by the officials of the examination centre.

  • All those candidates appearing for the entrance examination must ensure that the test booklet contains the same number of pages as mentioned on the cover of the test booklet.

Frequently Asked Questions<

NEET Biology Exam Pattern-FAQs

Question: How many questions will be there in the Biology section?

Ans. There will be 90 questions asked from the Biology section in which 45 questions will be asked from Botany and 45 questions will be asked from Zoology.

Question: Are there any sectional limits?

Ans. No, there is no sectional limit in NEET 2021. Candidates can dedicate as much time on a particular section.

Question: Will NEET Biology have a descriptive question?

Ans. No, According to NEET Biology Exam Pattern, the examination will only have Multiple Choice Questions (MCQs)

Question: How many marks will be deducted for unanswered questions in NEET Biology?

Ans. As per NEET Biology Paper Pattern, there will be no deduction of marks for unanswered questions. Such questions will not be taken into consideration while calculating the total marks of the candidate.

Question: What will be the marking scheme in NEET Biology Paper?

Ans. The candidates will be awarded +4 marks for each correct response whereas, -1 will be deducted for every incorrect answer.

*The article might have information for the previous academic years, which will be updated soon subject to the notification issued by the University/College.


rahul pandey
Can i get sample questions for neet at basic level
shivangi srivastava

Yes of course, we have attached a set of sample papers for NEET 2021 in the link below for your further analysis. You may go through these papers and try to solve them as much as you can to get a general idea of exam pattern, section wise weightage, marking scheme and much more.

NEET 2021 Sample Papers

ibashisha mukhim
I am facing problem in understanding the concepts of Biotechnology. From where should I study this topic?
sinbad chongtham

It is highly recommended for you to digest thoroughly the NCERT Biology textbooks of 11th and 12th standard. The questions asked in NEET exam are based on the NCERT concept. You can easily crack the exam by preparing from these textbooks.

How many questions are usually asked in plant physiology and classification of organisms?
sinbad chongtham

In the NEET Biology paper, the average number of questions asked from Plant Physiology is 7 and the average number of questions asked from Classification of Organisms is 4. You can check the complete question pattern at NEET Exam Question Pattern.

shubham sharma
Is NCERT sufficient enough to complete the syllabus?
diya suresh

No books or reference material is sufficient enough to score well in the exam, however NCERT textbooks must be the primary resource, as the syllabus for NEET is more or less based on NCERT 11th and 12th books. You can refer previous year question papers, study materials, mock test papers etc. to excel in the exam. To know more details visit NEET 2021 preparation tips.

avinash sahu
Which section is the toughest?
diya suresh

Hi Avinash, Out of the 3 sections of Physics, Chemistry and Biology, Physics is considered as important and toughest section. Chemistry is moderately difficult and Biology is comparatively easier than other 2. Find more details at NEET 2021 exam pattern.

saksham mahajan
Is there any good online coaching to prepare?
diya suresh

Hi Saksham, There are various android apps that allows you to prepare by means of previous year question papers, mock test and practise ppaers. Various online website offers study notes as well for preparation. Find details at NEET 2021 preparation.

Can I get some practice questions of microbiology part?
diya suresh

Hi Neha, Yes there are previous year question papers subject wise which is available in pdf format. This can be downloaded free of cost and easily. Also answer key is also made available in pdf format along with the practise papers.

arushi thankur
What is the weightage of different topics?
aniket ranjan

Hii Arushi, Greetings from collegedunia. The NEET exam consist of 45 questions of each section Physics, Chemistry, Botany, and Zoology. Each section has a weightage of 180 Marks. For more details Click Here

What is the weightage of plant physiology?
diya suresh

Hi Drona, There will be 45 questions in Botany section of Biology and for different topics number of question varies. Some of the topics with number of questions are:

  • Morphology of flowering plants – 5
  • Anatomy of flowering plants – 2
  • Plant Kingdom – 3

ammar zaheer ahmed
How many questions can be asked on ecology?
diya suresh

Hi Ammar, Ecology in Biology carries maximum weightage after major topics like Genetics and Biotechnology. There will be a total of around 7 questions from ecology topic in NEET exam. There will be easy, medium and difficult  questions from all topics including ecology.

diya suresh

Hi Ammar, Ecology in Biology carries maximum weightage after major topics like Genetics and Biotechnology. There will be a total of around 7 questions from ecology topic in NEET exam. There will be easy, medium and difficult  questions from all topics including ecology.

Where can I get sample papers for practice?
aniket ranjan

Hii Riyaz, Candidates are appearing for NEET 2021 need to practice maximum NEET question paper to get familiarized with the exam pattern and structure of the exam. For more details visit:- NEET SAMPLE PAPER

Is there any portion in Bio which has been deleted this year?
diya suresh

Hi Riyaz, As such there has been no modification in the syllabus of Biology section. You will get 45 questions each from botany and zoology part. Biology covers 50% of the total weightage of NEET exam.

neha thasale
Can the biology portion be prepared completely from Dinesh publication book?
diya suresh

Hi Neha, Most of the syllabus in NEET is based on NCERT 11th and 12th, so try to cover the syllabus there first. Also Objectve Biology from Dinesh & Co. is one of the best books to be preferred for exam preparation. To check more details clcik NEET 2021 preparation books.

What is the weightage of animal physiology?
diya suresh

Hi Nitika, Biology accounts for around 50% of the total weightage of NEET exam and there will be 45 questions each from botany and zoology. Some of teh topics with number of questions are:

  • Animal Kingdom – 2
  • Structural Organisation in Animals – 2
shruti verma
How many questions are asked on quantitative aptitude?
yash raj singh
For how many days is the exam conducted?
shiya devi
I appeared for the NEET exam in 2018. So the Eligibility of the NEET score will account from the date of the exam or the date of the result?
devnath tiwary

Dear Shiya Devi

Greetings from Collegedunia. NEET Exam is conducted every year for admission in various Medical Colleges belongs to Government and Private sectors. If you have passed Class 12 with PCB subjects 50% aggregate can apply for this exam. The date will be counted from the date of result and if failed to take admission in any college, then you have to appear again for NEET Exam. For more details, kindly go through this link –  NEET 2021 Exam

Can I get a government job on the basis of my NEET score?
gurpreet singh

HI Devisingh

You can get admission in any government job without even your NEET score. NEET exam is conducted to get admission in various UG medical courses. Visit on our official website of NEET to know more.

arushi thankur
How many times can I give the exam in my lifetime?
manika gupta

Hi, NEET upper age rule then specified that only unreserved candidates below the age of 25 and reserved candidates below the age of 30 would be allowed to appear for the NEET UG exam while the maximum attempts limit was set to three times. This rule was revoked by the Supreme Court in 2017. For more information, please refer, NEET Exam.

When can I register for exam this year?
manika gupta

Hi, You can register for NEET Exam on its official website. For more information, please refer, NEET Exam.