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NEET 2021 Biology Syllabus (PDF Available): NEET 11th and 12th Weightage, Download Here

Diksha Nautiyal
Diksha NautiyalPublished On: June 25, 2021 | NEET UG

The syllabus of NEET 2021 Biology includes topics from Class 11 and 12. NTA, the conducting authority of the exam releases the official syllabus for NEET every year. If you are looking to download the NEET Biology syllabus PDF, read the full article.  

NEET-UG Biology Syllabus

With NEET 2021 approaching, it is now high time for you to gear up your preparation. NEET-UG is all set to be conducted on 1st August 2021. With a few months remaining for the exam, you must have complete knowledge of  NEET syllabus. To speed up your exam preparation, it is imperative that you are acquainted with the latest topics that are to be asked in the exam. The question paper of NEET includes questions from Physics, Chemistry and Biology. We have listed below all the topics included in the NEET Biology syllabus from both Class 11 and 12. Read on and begin your NEET Biology preparation now.   

Also Read: NEET 2021 Most Important Topics

NEET Class 11 Biology Syllabus 2021

Here is the detailed syllabus for NEET Biology from Class 11. You can find the topics and sub-topics under them to prepare well. 


Topic Name


Unit I

Diversity in Living World

What is living?; Need for Classification; Biodiversity; Taxonomy and Systematics; Binomial Nomenclature; Concepts of Species; Taxonomical hierarchy; five Kingdom Classification; Lichens; Viruses and Viroids; Bryophytes; Pteridophytes; Angiosperms; Gymnosperms; Salient features and classification of animals-nonchordate up to phyla level and chordate up to classes level 

Unit II

Structural Organisation in Animals and Plants

Morphology and modifications; Functions and anatomy of different parts of flowering plants; tissues; Animal Tissues; Functions and anatomy of different systems

Unit III

Cell Structure and Function

Cell theory; Structure of eukaryotic and prokaryotic cell; animal cell and plant cell; cell membrane; cell envelope; cell wall; nucleolus; chromatin; cilia; microbodies; Golgi bodies; lysosomes; mitochondria; cell cycle; mitosis; meiosis; chemical constituents of living cells   

Unit IV

Plant Physiology

Transport in Plants; diffusion; water potential; plasmolysis; osmosis; absorption; symplast; transpiration pull; transpiration; translocation of mineral nutrients; nitrogen cycle; biological nitrogen fixation; hydroponics method to study mineral nutrition; phloem transport; mineral nutrition; photosynthesis; chemiosmotic hypothesis; photorespiration C3 and C4 pathway; photophosphorylation; respiration; the number of ATP molecules generated; TCA cycle; Electron transport system; plant growth and development; seed germination; differentiation; redifferentiation and dedifferentiation; seed dormancy; photoperiodism

Unit V

Human Physiology

Digestion and Absorption: role of digestive enzymes and gastrointestinal hormones; alimentary canal; digestive glands; carbohydrates and fats; Breathing and Respiration; respiratory organs in humans; respiratory organs in animals; Occupational; respiratory disorders; Emphysema; Body Fluids and Circulation; Blood composition; blood groups; lymph and its function; human circulatory system; cardiac cycle; ECG; Heart failure; Excretory Products and Their Elimination; Urine formation; Ammonotelism; ureotelism; Osmoregulation; Uricotelism; Atrial Natriuretic Factor; Uraemia; Renal failure; Dialysis; Locomotion and Movement: Skeletal system and its functions; Neural Control and Coordination: Neuron and nerves; nervous system; Chemical Coordination and regulation 

Also Read: NEET 2021 Study Plan and Preparation Strategy

NEET Class 12 Biology Syllabus 2021

Check out the detailed syllabus of NEET-UG Biology from Class 12 in the table below.




Unit I


Reproduction in Organisms; asexual and sexual reproduction; characteristic features in all organisms for the continuation of species; Sexual reproduction in flowering plants; Development of male and female gametophytes; Pollination; fertilization; double fertilization; endosperm and embryo; Human Reproduction; female and male reproductive system; menstrual cycle; oogenesis and gametogenesis-spermatogenesis; anatomy of ovary and testis; implantation; pregnancy & placenta formation; Reproductive Health

Unit II

Genetics and Evolution

Heredity and Variation: Mendelian inheritance; incomplete dominance; pleiotropy; co-dominance; sex determination in humans, birds, honey bee; chromosome theory of inheritance; linkage and crossing over; chromosomal disorders in humans; Molecular Basis of Inheritance; Geneticmateriala; structure of DNA and RNA; DNA replication; DNA packaging; transcription; translation; genetic code; Lac Operon; Gene regulation and expression; DNA fingerprinting; Evolution; origin of life; evolution; evidence

Unit III

Biology and Human Welfare

Health and Disease; parasites; pathogens; basic concepts of immunology-vaccines; AIDS and HIV; Improvement in Food Production;single-cell protein; tissue culture; biofortification; animal husbandry; Microbes in Human Welfare; household food processing; sewage treatment; industrial production; biofertilizers; biocontrol agents

Unit IV

Biotechnology and Its Application

Principles and Process of Biotechnology; Recombinant DNA technology; Application of Biotechnology in agriculture and health; vaccine production; human insulin; transgenic animals; gene therapy; Bt crops; biosafety issues-Biopiracy 

Unit V

Ecology and Environment

Organisms and Environment: Habitat; ecological adaptations; population; interactions-mutualism; predation; competition; parasitism; death rate; birth rate; age distribution; Ecosystem; patterns; productivity and decomposition; energy; carbon cycle; phosphorous cycle; ecological carbon fixation; oxygen release; pollination; ecological succession; Biodiversity and its Conservation; endangered organisms; patterns of biodiversity; Red Data Book; National parks and sanctuaries; Environmental Issues; Pollution; Solid waste management; Greenhouse effect; global warming; deforestation; ozone depletion

NEET Biology Syllabus 2021 PDF Download

If you wish to keep a hard copy of the syllabus for your preparation then you can use the link below for the same. Just click on the link and it will direct you to a new webpage. You will be able to view the syllabus in PDF format. You can then click on the downward arrow present in the upper right corner of the page and download the document. Use the syllabus as it is or get a printout at your convenience.

Complete Biology Syllabus for NEET-UG - PDF Download

NEET Biology Chapter-wise Weightage 2021

A detailed description of the chapter-wise weightage for the NEET Biology syllabus is given in the table below.

NEET Biology TopicsNEET Biology Chapter-wise Weightage (in %)
Biotechnology & Its Application3
Biology & Human Welfare4
Cell Structure and Function5
Plant Physiology6
Structural Organisations in Animals and Plants9
Ecology and Environment12
Diversity in Living World14
Genetics & Evolution18
Human Physiology20

NEET Biology 2021 Important Chapters

Here are some of the important topics from the NEET Biology syllabus that you can focus on. However, we advise you to focus equally on each topic as questions from any topics may be asked. 

Class 12 Important Topics for NEET Biology

Class 11 Important Topics for NEET Biology

Genetic and Evolution

Structural Organization 


Diversity in the Living World

Ecology and Environment

Human Physiology

Biotechnology and its Applications

Plant Physiology

Biology and Human Welfare

Cell Structure and Function

Most Scoring Chapters from NEET Biology 2021 Syllabus

Although every topic from the NEET Biology syllabus is equally important, there are certain chapters with high weightage that help in scoring well. Some of the most scoring NEET Biology chapters are mentioned below:

  • Genetics & Evolution
  • Biotechnology
  • Cell Structure and Function
  • Plant & Human Physiology (one must have a crystal clear understanding of the topics included)
  • Ecology (an easy topic to cover with very high weightage)

More On NEET-UG 2021

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Good Rank in NEET-UG 2021

To know more about NEET-UG 2021, stay tuned with CollegeDekho. 


How long will it take for me to complete NEET Biology full syllabus?

The time taken to complete the NEET Biology full syllabus varies for different candidates. Everyone has their own style of preparation. However, if one follows a NEET preparation timetable given here, it can take 4-5 months to completely master the entire syllabus.  

Where can I download the NEET Biology syllabus for 2021?

You can download the NEET Biology syllabus PDF 2021 on this page

Are there any changes in NEET 2021 Biology Syllabus?

As per the official statement by the HRD Minister - Ramesh Pokhriyal Nishank, there will be no changes in the NEET biology syllabus for 2021. The syllabus will remain the same as last year. 

Is NEET Biology syllabus tough?

NEET Biology syllabus contains topics from Class 12 and 11 textbooks. With proper preparation and time management, the syllabus of NEET Biology can be really easy for a candidate. 

NEET UG Previous Year Question Paper

NEET 2016 Question paper


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Related Questions

Sir/mam i am confused! Is there any scope for b. Sc forensic ? And from where I can do B. Sc forensic? Is shimla university is good for B. Sc forensic? Pls suggest me the right path..

-Sakshi MishraUpdated on July 24, 2021 05:36 PM
  • 7 Answers
Diksha Nautiyal, Student / Alumni

Dear student, 

Yes, B.Sc Forensic Science is a three-years long undergraduate programme that has ample career opportunities. After completing your Bachelor's in Forensic Science, you can work at CBI - Central Bureau of Investigation, IB - Intelligence Bureau, FSL - Forensic Science Laboratories, clinical research, civil services, police departments, and others. Some of the job profiles that you will be eligible for after completing the course include Forensic Scientist, Private Investigator, Drug Analyst, Crime Laboratory Analyst, Forensic Serologist, Forensic Architect, Forensic Engineer, Forensic Toxicologist, Police Officer, Forensic Consultant, etc. Depending upon your experience, skills and the organisation you are working with ...



-jassimUpdated on July 01, 2021 09:44 AM
  • 3 Answers
Simran Saini, CollegeDekho Expert


No, the respective institute does not offer admission to B.Sc Anesthesia Technology. There are many colleges in India which offer admission to the same:

B.Sc Anesthesia Technology Colleges in India

Hindustan Institute of Technology and Science (HITS)

Centurion University of Technology and Management (CUTM), Bhubaneswar

CT University (CTU), Ludhiana

OM Sterling Global University (OSGU), Hisar

Aarupadai Veedu Institute of Technology (AVIT), Chennai

To know more about the colleges mentioned above fill out our common application form and our education experts can help you apply for admissions.


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