NEET Biology Syllabus: Botany and Zoology Units Explained

Where biology sits in the NEET UG paper

NEET UG is one pen and paper test of 180 multiple choice questions in 3 hours. Physics and chemistry get 45 questions each. Biology gets double that, and the NTA prints it as two separate sections, botany and zoology, with 45 questions apiece. Every question is compulsory, and each has four options with one correct answer.

With 4 marks for a correct response and 1 mark taken away for a wrong one, a careless guess in biology cancels a quarter of a right answer. The complete paper layout for all three sciences is on our main NEET syllabus page.

Class 11 units of the NEET biology syllabus

Five of the ten units come from the class 11 book. Students often rush them in class 12, yet they carry roughly half the biology questions.

Unit 1: Diversity in the living world

What living means, biodiversity, taxonomy and systematics, the species concept and taxonomic hierarchy, binomial nomenclature, the five kingdom classification (Monera, Protista, Fungi), lichens, viruses and viroids, the plant groups from algae to gymnosperms, and the animal kingdom from non chordates up to chordates.

Unit 2: Structure of plants and animals

Morphology and anatomy of flowering plants (root, stem, leaf, inflorescence, flower, fruit and seed), the description of selected flowering plant families, animal tissues, and the digestive, circulatory, respiratory, nervous and reproductive systems of one animal.

Unit 3: Cell structure and function

Cell theory, prokaryotic and eukaryotic cells, the cell membrane and wall, organelles such as the endomembrane system, mitochondria, plastids and ribosomes, the nucleus, biomolecules and enzymes, and the cell cycle with mitosis and meiosis.

Unit 4: Plant physiology

Photosynthesis (pigments, light reactions, cyclic and non cyclic photophosphorylation, chemiosmosis, photorespiration, C3 and C4 pathways), respiration (glycolysis, the TCA cycle, electron transport, respiratory quotient) and plant growth and development with growth regulators.

Unit 5: Human physiology

Breathing and exchange of gases, body fluids and circulation including the cardiac cycle and ECG, excretion and osmoregulation, locomotion and movement, neural control and coordination, and chemical coordination through hormones, along with the disorders listed under each.

Class 12 units in the biology syllabus for NEET

Unit 6: Reproduction

Sexual reproduction in flowering plants (pollination, double fertilisation, endosperm and embryo, apomixis and polyembryony), human reproduction (gametogenesis, the menstrual cycle, fertilisation, pregnancy, parturition and lactation) and reproductive health, covering contraception, MTP, sexually transmitted infections and assisted reproduction such as IVF, ZIFT and GIFT.

Unit 7: Genetics and evolution

Mendelian inheritance and its deviations, blood groups, polygenic inheritance, the chromosome theory, linkage and crossing over, sex determination, sex linked and chromosomal disorders, then the molecular side: DNA and RNA structure, replication, transcription, the genetic code, translation, the lac operon, the Human Genome Project and DNA fingerprinting. Evolution closes the unit with natural selection, the Hardy Weinberg principle, adaptive radiation and human evolution.

Unit 8: Biology and human welfare

Pathogens and diseases such as malaria, typhoid, pneumonia, dengue and the common cold, basic immunology and vaccines, cancer, HIV and AIDS, adolescence and drug and alcohol abuse, plus microbes in household products, industry, sewage treatment and biogas.

Unit 9: Biotechnology and its applications

Principles and tools of recombinant DNA technology, and its uses in health and farming: human insulin, vaccines, gene therapy, genetically modified crops, transgenic animals, biosafety, biopiracy and patents.

Unit 10: Ecology and environment

Organisms and populations with population interactions, ecosystem structure, productivity, decomposition, energy flow and ecological pyramids, and biodiversity with its conservation through hotspots, national parks, sanctuaries, biosphere reserves and sacred groves.

What dropped out when NCERT was trimmed

The NMC list follows the rationalised NCERT books, so several chapters printed in older guidebooks are not part of the current biology syllabus for NEET. Reports comparing the lists point to these as missing from the unit headings: digestion and absorption, transport in plants, mineral nutrition, reproduction in organisms, strategies for enhancement in food production and environmental issues. A few of these ideas survive in pieces inside other chapters, which is why you should read the official subtopic list rather than whole chapter names.

One wording has confused many students. Unit 2 speaks of the organ systems of "an insect" and names the frog in brackets, so people are unsure which animal to study. That doubt gets its own answer on our cockroach in NEET page.

Chapters that keep returning in past papers

Analyses of the last few NEET papers show a fairly stable pattern of where questions cluster. On the botany side, molecular basis of inheritance and principles of inheritance usually give the most questions, followed by cell cycle and cell division, plant kingdom, plant anatomy and morphology, and sexual reproduction in flowering plants. In zoology, animal kingdom, the two biotechnology chapters, biomolecules, structural organisation in animals and reproductive health stand out.

Small chapters still matter. The living world or neural control may give only one question in a year, but each is a full 4 marks and is usually a direct NCERT line. Treat weightage as an order of revision, not a licence to skip.

To see how these chapters are actually framed, solve the NEET previous year papers unit by unit before you attempt them as full papers.

Building up to a biology full syllabus test for NEET

Many aspirants search for a biology NEET full syllabus mock test, but a full test only helps once each unit has been revised at least once. A sensible build up looks like this.

1. Unit tests first. After each unit, sit 45 questions from it in about 35 minutes, the pace you will need on the day.
2. Class wise tests next. When all class 11 units are done, take one 90 question test on them alone, then repeat for class 12.
3. Then the full syllabus. A neet biology full syllabus mock test should have 45 botany and 45 zoology questions in about 70 minutes, so you leave the rest of the 3 hours for physics and chemistry.
4. Mark it the real way. Add 4 per right answer and subtract 1 per wrong answer, and write down how many marks your guesses cost you.

Books and a study rhythm that fit this syllabus

Because questions lean so heavily on textbook statements, diagrams, tables and examples, the class 11 and class 12 NCERT biology books are the base for everyone. Read the summary boxes and figure labels, since options are often built from them. One question bank arranged by NCERT chapter is enough on top of that; several books only repeat the same facts in different words.

A rhythm that works for most students is two biology sessions a day: a morning reading session on new pages and an evening session of 40 to 60 questions on what was read earlier in the week. Keep a single notebook for facts you keep getting wrong, such as hormone sources, disease pathogens or the ploidy of plant tissues, and revise it every Sunday.

Once biology feels steady, check your overall score against the NEET cut off trends and confirm the subject rules in NEET eligibility.

Getting the official biology list

The NMC uploads the syllabus as a public notice, which the testing agency then attaches to its bulletin on the NEET portal. The same document carries physics and chemistry, which are covered unit by unit on our NEET physics syllabus and NEET chemistry syllabus pages. Further medical and engineering tests are grouped on the entrance exams hub.