CUET Biology Syllabus: Units, Chapters and How the Paper Is Marked

Biology as a CUET UG domain paper

CUET UG lets you choose up to five tests in total from languages, domain subjects and the General Aptitude Test. Biology is the domain paper most universities ask for when you apply to life science programmes. Subject rules differ by university, so check what your chosen programmes demand before finalising the five papers.

Earlier cycles let you leave out some questions and gave you less time. In the current format no question is optional and you get a full hour, and the wider rules for all papers sit in our guide to the CUET UG syllabus.

CUET biology syllabus: the five units

First unit, reproduction

• Flowering plants: parts of the flower, how pollen and the embryo sac form, self and cross pollination with their agents, how the pistil accepts or rejects pollen, the double fertilisation event, then seed, fruit and endosperm formation, plus special cases like apomixis, polyembryony and seedless fruits
• Humans: male and female organs, how sperm and ova are produced, the monthly cycle and its hormones, fertilisation, implantation, the role of the placenta, birth and milk production in outline
• Reproductive health: contraception methods, sexually transmitted infections, MTP, amniocentesis, and help for infertile couples through IVF, GIFT and ZIFT

Second unit, genetics and evolution

• Inheritance: Mendel's monohybrid and dihybrid crosses, incomplete dominance, codominance, ABO blood groups as a case of multiple alleles, pleiotropy and polygenic traits, linkage, how sex is decided in different animals, haemophilia and colour blindness, thalassaemia, and syndromes caused by chromosome number changes
• Molecular basis: the double helix and RNA types, how DNA is packed, copied and read, codons, protein synthesis, gene regulation through the lac operon, genome sequencing projects and DNA fingerprinting
• Evolution: theories on the origin of life, evidence from fossils, anatomy and molecules, natural selection, the modern synthesis, Hardy Weinberg equilibrium, drift and gene flow, adaptive radiation and the human story

Third unit, biology and human welfare

• Health and disease: infections like malaria, dengue, typhoid and pneumonia, innate and acquired immunity, vaccination, cancer, HIV, and addiction to drugs and alcohol
• Useful microbes: curd and bread making, antibiotics and other industrial products, treating sewage, producing biogas, controlling pests and enriching soil

Fourth unit, biotechnology

• Tools and process: restriction enzymes, cloning vectors, making recombinant DNA, PCR, bioreactors and product recovery
• Uses: insulin from engineered bacteria, gene therapy, early molecular diagnosis, pest resistant Bt crops, RNA interference, transgenic animals, plus ethics such as biosafety and biopiracy

Fifth unit, ecology

• Populations: birth and death rates, age pyramids, exponential and logistic growth, and interactions like predation, competition, parasitism and mutualism
• Ecosystems: their components, productivity, how litter breaks down, the way energy passes along food chains, and ecological pyramids built on energy, biomass or numbers
• Biodiversity: levels and patterns, causes of loss, hotspots, sacred groves, protected areas and conservation in and outside natural habitats

Check the chapter list against NTA's file

NCERT trimmed its class 12 biology book in a recent rationalisation, dropping the opening chapter on how organisms reproduce, the chapter on boosting food production and the closing one on environmental problems, along with parts of ecology like succession and nutrient cycles. Several older CUET lists still show those chapters. The list above follows the current NCERT book, which is what the CUET domain papers are meant to match.

Units that need the biggest share of your hours

NTA does not release a chapter wise question count. Judging by how many pages each unit fills in the textbook and by recent papers, genetics and evolution is usually the heaviest unit, followed by reproduction and ecology. Biotechnology is short but concept dense, and human welfare questions are often direct and quick to answer.

• Inheritance problems and the molecular basis chapter reward step by step understanding, not memorising.
• Reproduction and human health chapters contain many named terms and examples; flash cards work well here.
• Ecology questions often test definitions, graphs of population growth and examples of interactions.

Question styles in the biology paper

• Statement based: pick the correct or incorrect statements about, say, the lac operon or double fertilisation
• Match the columns: diseases with pathogens, contraceptive methods with their type, enzymes with their role
• Assertion and reason: common in genetics and evolution
• Diagram based: labelled parts of a flower, the human sperm, or a DNA replication fork
• Short problems: genotype and phenotype ratios from a cross, or a Hardy Weinberg calculation

Since you have 72 seconds per question on average, read each statement carefully but do not overthink the easier ones. Wrong guesses cost a mark each.

Planning from boards to the CUET window

1. Board months: study every NCERT chapter line by line, including diagrams, tables and the summary boxes. These are the source of most CUET items.
2. First three weeks after boards: switch to objective practice. Do one 50 question timed set every other day and log mistakes by chapter.
3. Final fortnight: full papers in 60 minutes, then reread NCERT pages linked to your mistakes.

Books and official sources

The class 12 NCERT biology textbook is the base. The NCERT exemplar adds harder statement and assertion questions. Use the CUET biology question papers NTA has released for earlier cycles to judge the level. For board alignment, our CBSE class 12 syllabus guide gives the board side of these chapters, and the NEET biology syllabus shows the wider class 11 and 12 scope if you are taking both tests.

Many life science aspirants add chemistry as a second domain paper, outlined in the CUET chemistry syllabus, and some add physics through the CUET physics syllabus.