CUET Biology Important Topics & Chapter Wise Weightage
Common University Entrance Test 2026 ( CUET )
CUET 2026 exam will be administered at national level for admission to UG courses. Candidates preparing for CUET Biology must dive into 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 conduct CUET exam for UG admissions across India. As per the tentative CUET 2026 exam dates, the exam for all domain subjects, including Biology, will be held in May. 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.
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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.
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 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.
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24 Dec '25
1 Jan '26
1 Dec '25 - 14 Jan '26
5 Jan '26 - 31 Jan '26
27 Feb '26
28 Feb '26
5 Jan '26 - 6 Apr '26
10 Mar '26 - 15 Apr '26
30 Apr '26 - 18 Jun '26
24 Mar '26
| 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 |
Reproduction in organisms: Reproduction, a characteristic feature of all organisms for the continuation of species; Modes of reproduction –Asexual and sexual; Asexual reproduction; Modes- Binary fission, sporulation, budding, gemmule, fragmentation; vegetative propagation in plants. Sexual reproduction in flowering plants: Flower structure; Development of male and female gametophytes; Pollination–types, agencies and examples; Outbreedings devices; Pollen-Pistil interaction; Double fertilization; Post fertilization events– Development of endosperm and embryo, Development of seed and formation of fruit; Special modes– apomixis, parthenocarpy, polyembryony; Significance of seed and fruit formation. Human Reproduction: Male and female reproductive systems; Microscopic anatomy of testis and ovary; Gametogenesis- spermatogenesis & oogenesis; Menstrual cycle; Fertilisation, embryo development upto blastocyst formation, implantation; Pregnancy and placenta formation (Elementary idea); Parturition (Elementary idea); Lactation (Elementary idea). Reproductive health: Need for reproductive health and prevention of sexually transmitted diseases(STD); Birth control- Need and Methods, Contraception and Medical Termination of Pregnancy (MTP); Amniocentesis; Infertility and assisted reproductive technologies – IVF, ZIFT, GIFT (Elementary idea for general awareness). |
| Unit II: Genetics and Evolution |
Heredity and variation: Mendelian Inheritance; Deviations from Mendelism– Incomplete dominance, Co-dominance, Multiple alleles and Inheritance of blood groups, Pleiotropy; Elementary idea of polygenic inheritance; Chromosome theory of inheritance; Chromosomes and genes; Sex determination –In humans, birds, honeybee; Linkage and crossing over; Sex-linked inheritance- Haemophilia, Colour blindness; Mendelian disorders in humans– Thalassemia; Chromosomal disorders in humans; Down syndrome, Turner’s and Klinefelter’s syndromes. Molecular Basis of Inheritance: Search for genetic material and DNA as genetic material; Structure of DNA and RNA; DNA packaging; DNA replication; Central dogma; Transcription, genetic code, translation; Gene expression and regulation–Lac Operon; Genome and human genome project; DNA fingerprinting. Evolution: Origin of life; Biological evolution and evidence for biological evolution (Paleontological, comparative anatomy, embryology, and molecular evidence); Darwin’s contribution, Modern Synthetic theory of Evolution; Mechanism of evolution–Variation(Mutation and Recombination) and Natural Selection with examples, types of natural selection; Gene flow and genetic drift; Hardy- Weinberg’sprinciple; Adaptive Radiation; Human evolution. |
| Unit III: Biology and human welfare |
Health and Disease: Pathogens; parasites causing human diseases (Malaria, Filariasis, Ascariasis, Typhoid, Pneumonia, common cold, amoebiasis, ring worm); Basic concepts of immunology–vaccines; Cancer, HIV and AIDs; Adolescence, drug and alcohol abuse. Improvement in food production: Plant breeding, tissue culture, single cell protein, Biofortification; Apiculture and Animal husbandry. Microbes in human welfare: In household food processing, industrial production, sewage treatment, energy generation, and as biocontrol agents and biofertilizers. |
| Unit IV: Biotechnology and its Applications |
Principles and process of Biotechnology: Genetic engineering(RecombinantDNAtechnology). Application of Biotechnology in health and agriculture: Human insulin and vaccine production, gene therapy; Genetically modified organisms-Bt crops; Transgenic Animals; Biosafety issues–Biopiracy and patents. |
| Unit V: Ecology and Environment |
Organisms and environment: Habitat and niche; Population and ecological adaptations; Population interactions– mutualism, competition, predation, parasitism; Population attributes–growth, birth rate and death rate, age distribution. Ecosystems: Patterns, components; productivity and decomposition; Energy flow; Pyramids of number, biomass, energy; Nutrient cycling (carbon and phosphorous); Ecological succession; Ecological Services– Carbon fixation, pollination, oxygen release. Biodiversity and its conservation: Concept of Biodiversity; Patterns of Biodiversity; Importance of Biodiversity; Loss of Biodiversity; Biodiversity conservation; Hotspots, endangered organisms, extinction, Red Data Book, biosphere reserves, National parks, and sanctuaries. Environmental issues: Air pollution and its control; Water pollution and its control; Agrochemicals and their effects; Solid waste management; Radioactive waste management; Greenhouse effect and global warming; Ozone depletion; Deforestation; Any three case studies as success stories addressing environmental issues. |
Know what is radioactivity in detail.
Also Read: CUET Syllabus 2026
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 preparing for CUET Biology exam can refer to the previous year's analysis to get an idea of important topics and the number of questions from each topic. The table below mentions the expected chapter-wise weightage for CUET Biology exam based on 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 for Science/Commerce/Humanities
CUET Domain Subjects: Syllabus and Question Paper
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:
- Visit the link provided- CUET Question Paper
- Scroll down the page and look for the subject to download the question paper for
- Click on the tab download
- Create the login credentials 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:
Provide familiarity with format, structure, and types of questions.
Candidates can identify repeated question types.
It helps candidates know their strong and weak areas.
It helps candidates develop time management skills.
Regularly solving CUET question papers improves problem-solving skills and speed.
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 and 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 the exam pattern and syllabus.
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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
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Student Forum
Anything you would want to ask experts?Answered Yesterday
For Common University Entrance Test (CUET UG) 2026 exam, candidates who have passed class 12th exam or are appearing for final examinations will be eligible to apply for CUET exam. Student must have scored 50% marks in total (general category) or 45% marks (SC/ST and other categories). There is no a
M
Contributor-Level 6
Answered Yesterday
CUET UG 2026 exam will be held a Computer Based Test. In this mode of examination, candidates will have to report at the alloted CUET exam centre. Applicants will have to take exam on computer screens only. The screen will display the questions and candidates can select the correct option and save c
N
Contributor-Level 6
Answered Yesterday
National Testing Agency has not introduced any specific changes for CUET UG 2026. However, in CUET 2025, NTA introduced major changes like
- Reduction of CUET subjects from 63 to 37
- GAT scores will be used for dropped subjects
- Exma to be held CBT mode only
- Compulsory 50 questions in each subject, no optio
N
Contributor-Level 6
Answered Yesterday
Candidates can apply for CUET exam 2026 in first week of March 2026. NTA will release the CUET application form 2026 online at cuet.nta.nic.in. Candidates must make sure to register for CUET exam and select appropriate CUET subjects to be eligible for admissions. CUET UG application form 2026 are ex
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Contributor-Level 6
Answered 3 days ago
Quantum university is one of the best university in North india because Quantum university is quite famous for good quality education with affordable fees.Psychology is the study of human behavior and mental processes. Psychologists study a person's reactions, emotions, and behavior, and apply their
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Beginner-Level 5
Answered 3 days ago
Yes, 700 is a good score in CUET. This score can help candidates place in top colleges of Delhi University, banaras Hindu University and Allahabad University. 700 score is considered to a CUET good score marking a percentile of 95+.
N
Contributor-Level 6
Answered 3 days ago
Yes, National Testing Agency has released the official link of CUET UG 2026. Candidates will be able to check the latest updates for CUET 2026 exam at cuet.nta.nic.in. CUET 2026 official notification will be released on the official website.
D
Contributor-Level 6
Answered 3 days ago
No, CUET UG 2026 application form has not been released yet. It is expected that NTA will commence CUET registration 2026 in first week of March at cuet.nta.nic.in. Candidates seeking admisison to UG courses of central, state, private or deemed universities must fill the online application form befo
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Contributor-Level 6
Answered 3 days ago
The best CUET course depends on candidate's interest, stream, subjects studied in class 12th. Some of the top CUET UG courses with best career options are B.Sc (Chemistry, Physics, CS), B.Com (Pass, Hons.), BBA/BMS/BFIA, BA (Economics, English, History), BCA and integrated programs. Candidates must
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Contributor-Level 6
Answered 3 days ago
Common University Entrance Test (CUET) is conducted for admission to UG courses of central, state, private and deemed universities. National Testing Agency (NTA) conducts CUET exam annually for students desireous of taking admission to colleges of Delhi University, Banaras Hindu University, Allahaba
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Beginner-Level 5
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.