CUET Biology Important Topics & Chapter Wise Weightage
Common University Entrance Test 2026 ( CUET )
Registration - 3 Jan '26 - 30 Jan '26
CUET 2026 exam will be conducted at national level for admission to UG courses. Candidates preparing for CUET Biology must check CUET Biology important topics and chapter-wise weightage to ace the examination. Check the important subjects and question weightage for preparation.
CUET Biology Important Topics & Chapter Wise Weightage
CUET Biology Important Topics and Weightage: The National Testing Agency will be conducting CUET exam for UG admissions across India. As per the CUET 2026 exam dates, the exam for all domain subjects, including Biology, will be held from May 11 to 31. Candidates aspiring for Biology related courses have to select Biology as their domain subject during the CUET registration 2026. Such candidates must get an understanding of the CUET Biology important topics and chapter-wise weightage before they start the CUET preparation.
While preparing for CUET 2026 exam for Biology admission, candidates must focus on the important topics and chapter weightage. Read this article to know the CUET Biology important topics and chapter wise weightage for a top-notch preparation strategy.
LATEST:
Explore colleges based on CUET
Want better recommendations?
There is a 90% more chance of getting best college recommendations by sharing preferences.
- Chat with our counselor
- Get your personalised list of colleges & exams matching your preferences
- CUET Biology Exam Pattern 2026
- CUET Biology Syllabus 2026
- CUET Biology Important Topics
- CUET Biology Chapter Wise Weightage
- CUET Domain Subjects: Syllabus and Question Paper
- CUET Biology Preparation Tips
CUET Biology Exam Pattern 2026
Before candidates start preparing, they must obtain a good understanding of the CUET exam pattern. CUET exam pattern remains the same, irrespective of the domain subject. Refer to the table below for more details on CUET UG exam pattern 2026.
| Features |
Details |
|---|---|
| Number of questions |
50 (compulsory) |
| Type of questions |
Multiple Choice Question (MCQ) |
| CUET Biology exam duration |
60 minutes |
| CUET marking scheme |
+5 for each correct answer -1 for each incorrect answer |
CUET Biology Syllabus 2026
The table below mentions the CUET Biology syllabus:
| Unit as per CUET Biology Syllabus |
Topics in CUET Biology Syllabus |
|---|---|
| Unit I: Reproduction |
Sexual Reproduction in Flowering Plants: Pre-fertilisation: structure and events - stamen, microsporangium and pollen grain, pistil, megasporangium and embryo sac; Development of male (microsporogenesis) and female gametophyte (megasporogenesis); Pollination – types, agents and examples; Out breeding devices; Pollen-pistil interaction; Double fertilisation; Post fertilisation: structure and events – development of endosperm and embryo; Formation of seed and fruit and parthenocarpy; Significance of seed in angiosperms; Apomixis and polyembryony. Human Reproduction: Male and female reproductive systems; microscopic anatomy of testis and ovary; gametogenesis - spermatogenesis and oogenesis; menstrual cycle; fertilisation, embryo development up to blastocyst formation, implantation; pregnancy and embryoni development and placenta; Parturition and lactation. Reproductive Health: Problems and strateies - amniocentesis; Population stabilisation and birth control – various methods of contraception; Medical termination of pregnancy (MTP); Sexually transmitted infections (STIs); Infertility – Assisted reproductive technologies (IVF, ZIFT, GIFT, ICSI and IUI). |
| Unit II: Genetics and Evolution |
Principles of Inheritance and Variation: Mendel’s law of inheritance: Inheritance of one gene – Law of dominance, law of segregation (test and back cross); Deviation from Mendelism – incomplete dominance and co-dominance; Multiple alleles and inheritance of blood groups; Inheritance of two genes – law of independent assortment, dihybrid cross; Chromosomal theory of inheritance; Linkage and recombination; Polygenic inheritance; Pleiotropy; Sex determination in humans, birds and honey bee; Mutation; Genetic disorders – pedigree analysis, Mendelian disorders (colour blindness, haemophilia, sickle-cell anaemia, phenylketonuria and thalassemia), chromosomal disorders in humans (aneuploidy, polyploidy, Down's syndrome, Turner's syndrome and Klinefelter's syndrome). Molecular Basis of Inheritance: Structure and packaging of DNA helix; Search for genetic material (transforming principle and Hershey-Chase experiment); Properties of genetic material; Replication (Meselson and Stahl’s experiment); Transcription – transcription unit and gene; RNA world – types of RNA and process of transcription; Genetic code and mutations; tRNA; Translation; Regulation of gene expression – Lac operon; Human Genome Project (goals, salient features and applications); DNA fingerprinting (polymorphism and VNTR). Evolution: Origin of life – Miller’s experiment; Concepts of evolution (Darwin's contribution); Evidences for evolution (embryology, paleontology, comparative anatomy, divergent and convergent evolution and industrial evolution); Adaptive radiation; Biological evolution; Natural selection; Mechanism of evolution; Hardy-Weinberg principle and affecting factors (gene migration, genetic drift, mutation, recombination and natural selection); Evolution of plants and vertebrates through geological periods; Origin and evolution of man. |
| Unit III: Biology and human welfare |
Human Health and Disease: Introduction about health; Common diseases in humans (typhoid, pneumonia, common cold, malaria, amoebiasis, ascariasis, filariasis and ringworms); Immunity – innate and acquired immunity, active and passive immunity, vaccination and immunisation, allergies, auto-immunity and immune system in human; AIDS; Cancer; Drugs and alcohol abuse - adolescence, addiction, effects of drug abuse, prevention and control. Microbes in Human Welfare: Microbes in household products; Microbes in industrial products – beverages, antibiotics, enzymes and bioactive molecules; Microbes in sewage treatment and production of biogas, Microbes as biocontrol agents and biofertilisers. |
| Unit IV: Biotechnology and its Applications |
Biotechnology: Principles and Processes: Principles of biotechnology; Tools of recombinant DNA technology – restriction enzymes, cloning vectors, competent host; Processes of rDNA technology – isolation, amplification of gene (PCR), insertion of rDNA in host and bioreactors; Downstream processing. Biotechnology and its Applications: Application of biotechnology in agriculture – tissue |
| Unit V: Ecology and Environment |
Organisms and Populations: Population attributes - birth and death rate, age pyramids; Population growth – exponential and logistic growth; Life history variation; Population interactions – predation, competition, parasitism, commensalism, mutualism and amensalism. Ecosystem: Structure and function; Productivity; Decomposition; Energy flow – different trophic levels, food chain and food web; Ecological pyramids – pyramid of energy, biomass and number. Biodiversity and Conservation: Biodiversity – concept, patterns and importance; Causes of biodiversity loss; Biodiversity conservation – approaches (narrowly utilitarian, broadly utilitarian and ethical); Methods of biodiversity conservation – in situ (endemism, hotspots and sacred groves etc.), ex situ (Wildlife safaris, zoological parks and cryopreservation etc.). |
Also Read: CUET Syllabus 2026
CUET UG question paper for each subject will consist of 50 questions. Candidates will be required to attempt all questions and no optional questions will be provided. In CUET UG 2026 there are 37 subjects- 13 languages, 23 domain subjects and general tests. While filling the CUET application form, candidates can select upto five CUET subjects aligning with the subjects studied in class 12th and course requirement.
Candidates must attempt all the questions of the subjects selected. However, candidates must keep in mind the negative marking and select the options carefully.
As per the CUET UG 2026 exam pattern -
The question paper will include 50 multiple-choice questions (MCQs). The CUET UG 2026 exam will be conducted for 13 languages, 23 domain subjects, and general test. Each subject will consist of 50 MCQs and there will no optional questions. All questions are mandatory to attempt. For every wrong answer negative marking of one mark will be attracted.
CUET Biology Important Topics
The table below mentions the unit wise important topics for CUET Biology exam:
| Name of CUET Biology Unit |
CUET Biology Important Topics |
|---|---|
| Reproduction |
|
| Genetics and Evolution |
|
| Biology and Human Welfare |
|
| Biotechnology and Its Application |
|
| Ecology and Environment |
|
CUET Biology Chapter Wise Weightage
Candidates can evaluate the CUET Biology chapter wise weightage after going through past exam analysis for the domain subject and question papers. The weightage for different chapter in CUET Biology paper can change each year. The table below mentions the expected chapter-wise weightage for CUET Biology exam as per the past trends:
| Important topics |
Expected number of questions |
|---|---|
| Reproduction |
15 |
| Ecology and Environment |
10 |
| Biology and Human Welfare |
8 |
| Genetics and Evolution |
10 |
| Biotechnology and Its Application |
7 |
Also Read: CUET Chapter Wise Weightage
CUET Domain Subjects: Syllabus and Question Paper
Candidates aspiring for CUET can download the CUET domain subject wise question paper and syllabus PDF for other subjects below:
| Subjects |
CUET Syllabus |
CUET Question Paper |
|---|---|---|
| English |
||
| Biology |
||
| Accountancy/ Book Keeping |
||
| Business Studies |
||
| Chemistry |
||
| Computer Science/ Informatics Practices |
||
| Engineering Graphics |
||
| Entrepreneurship |
||
| Geography/Geology |
||
| Home Science |
||
| Knowledge Tradition and Practices of India |
CUET Knowledge Tradition and Practices of India Question Paper |
|
| Legal Studies |
||
| Environmental Science |
||
| Mathematics |
||
| Physical Education/ NCC /Yoga |
||
| Physics |
||
| Political Science |
||
| Psychology |
||
| Sociology |
||
| Teaching Aptitude |
||
| Agriculture |
||
| Mass Media/ Mass Communication |
||
| Anthropology |
||
| Fine Arts/ Visual Arts (Sculpture/ Painting)/Commercial Arts |
||
| Performing Arts |
||
| History |
||
| General Test |
CUET Biology Preparation Tips
During the CUET 2026 preparation for Biology domain subject, candidates can follow the preparation tips for holistic exam preparation:
- Analyse past papers to know the important topics that appear in CUET Biology question paper.
- Study using CBSE books to obtain foundational clarity of the topics.
- Practise previous year question papers. Candidates can also practise using mock tests: This will help candidates in improving their speed and accuracy.
- Make short notes for help in revision phase
Preparing for any competitive exam will also require clarity of the exam pattern. Candidates must analyse the past papers to understand test structure and syllabus.
Explore more Science exams with upcoming dates
30 Jan '26
1 Nov '25 - 31 Jan '26
27 Feb '26
28 Feb '26
5 Jan '26 - 6 Apr '26
10 Mar '26 - 15 Apr '26
5 Mar '26
13 Mar '26
14 Nov '25 - 22 Apr '26
Read More:
The CUET questions are objective in nature and carries four options also known as MCQs. Candidates will have to choose the correct answer option and click on it with the help of mouse. Since CUET UG 2026 exam will be conducted in a CBT mode, test-takers will be able to mark only one answer option. In case it is the correct option, students will get +5 marks and in case of wrong answer, negative marking scheme will be applied. Hence, candidates must ensure the accuracy of the answer before selecting the answer.
Common University Entrance Test (CUET) sample papers are released by the conducting body, National Testing Agency (NTA). To download the CUET question papers follow the steps below:
- Go to- CUET Question Paper
- Select CUET subject to download the question paper for
- Click on the tab download
- Create the login details for new registrations
- Link to download the CUET question paper will be sent on the registered email ID
- Click on the link provided and save the PDF.
Practicing with CUET UG (Common University Entrance Test) question papers from previous years offers following benefits:
Helps in knowing format, structure, and types of questions.
Student can know repeated question types.
Help students know weak and strong sections
Helps in developing important skills.
Regularly solving CUET question papers improves problem-solving skills and speed.
Abhishek is a content writer and editor with 7+ years of experience in education journalism. He completed his graduation from University of Delhi with a BA Degree. At Shiksha.com, he handles content for MBA, BBA, an
Read Full BioNews & Updates
Explore Other Exams
5 Jan '26 - 6 Apr '26 | NEST 2026 Application Process |
5 Jan '26 - 12 Apr '26 | NEST 2026 Application Process |
Mar '26 | IISER Aptitude Test 2026 Regis... |
Apr '26 | IISER Aptitude Test 2026 Corre... |
Jul '25 | ITM NEST 2025 Result Date |
Jun '25 | ITM NEST 2025 Exam date |
Mar '26 | OUAT Entrance Exam 2026 Form A... |
Apr '26 | OUAT Entrance Exam 2026 Form A... |
Jul '22 | DAVV CET 2022 Registration |
Dec '24 | TISSNET 2024 Mock Test |
Jun '24 | TISS Online Assessment 2024 |
Student Forum
Anything you would want to ask experts?Answered 7 hours ago
Yes, Gurugram University does accept CUET UG and CUET PG for admission to its UG & PG courses respectively. The exam is accepted for selective courses only. Some of the courses for which CUET is accepted are - BBA, BSc, LLB, MSc, MBA, etc.
A
Contributor-Level 10
Answered Yesterday
No, CUET exam is not compulsory to take admission in Christ College of Science and Management. The admissions are done on merit basis. Final selections are based on marks scored in qualifying exam and interview performance.
R
Contributor-Level 8
Answered Yesterday
It's completely normal to feel confused when deciding between completely different streams for CUET. The choice should depend on your long-term goals, interests, and career plans rather than pressure or trends. Humanities subjects like Political Science, Fine Arts, or Physiology suit students who ar
A
Beginner-Level 2
Answered Yesterday
For CUET UG 2026, aspirants should be aware of all important dates to plan their preparation effectively. The key dates are:
- Registration Starts: 3 January 2026
- Last Date to Apply: 30 January 2026 (up to 11:50 PM)
- Fee Payment Deadline: 31 January 2026 (up to 11:50 PM)
- Correction Window: 2–4 February 202
A
Beginner-Level 2
Answered Yesterday
It's completely normal to feel confused about CUET, especially with so many subjects and topics to cover. The best approach is to start with a clear plan and small, consistent steps. Begin by understanding the syllabus thoroughly and identifying which sections need more focus. Practicing mock tests
T
Beginner-Level 2
Answered 2 days ago
Compared to board exams, CUET Maths requires a different approach. You can't rely on long methods; shortcuts matter a lot. Practicing CUET-style Maths mocks on cuetmock.com helped me adapt to this shift and understand which chapters are more scoring in a competitive setting.
T
Beginner-Level 2
Answered 2 days ago
Yes, candidates who wish to apply for BTech (Lateral Entry) admissions at MJRPU are required to appear for the CUET to qualify. However, CUET scores are not accepted for the first year BTech admissions at MJRPU. Candidates are required to appear for the JEE Mains to qualify for first year admissions
S
Contributor-Level 10
Answered 2 days ago
No, CUET exam is not required for taking admission into the courses offered by ITM-institute of Health Science. The college follows a merit-based selection method.
R
Contributor-Level 8
Answered 6 days ago
National Testing Agency commenced CUET UG 2026 registrations on January 03, 2026. The registration window is open. Candidates who are desireous of appearing for CUET and admission to undergraduate programme must stay updated with the upcoming important CUET 2026 UG dates below:
- Last date to apply fo
N
Contributor-Level 6
Answered 6 days ago
CUET UG 2026 application fee varies on number of subjects chosen and category of student. NTA has defined the CUET 2026 fe structure for General, SC, ST, EWS, PwBD and OBC candidates. Check the table below to know CUET application fee for 5 subjects:
| Category | CUET Fee for 5 Subjects |
|---|---|
| General | INR 1800 |
| OBC-NCL/EWS | INR 1650 |
| SC/ST/PwBD/Third Gender | INR 1500 |
| Centres outside India | INR 8100 |
S
Contributor-Level 6
CUET UG Language section will include 50 questions. Candidates must attempt all questions. There will be no optional questions.
The language section will check candidate's reading comprehension based on different types of passages. This section will also include questions from grammar. To prepare for the CUET UG language section, candidates must solve previous year question papers and mock tests to become familiar with the type of questions asked in the exam.