CBSE Class 12 Sample Papers Biology for 2026 Exams
CBSE Class 12 Sample Papers Biology
CBSE Class 12 sample papers biology help students prepare better for the upcoming board exams in 2026. These papers are based on the latest CBSE Biology Syllabus and exam pattern. By solving CBSE class 12 biology sample papers, you can learn the types of questions asked, understand the marking scheme, and know how to write answers correctly. Class 12 biology sample papers, when practised under timed conditions, also improve speed and accuracy.
In Class 12th, Biology is a subject where you can score well because mostly there is theory. Practising the Biology CBSE sample paper class 12 helps you revise chapters and focus on important questions.
CBSE Class 12 Sample Papers with Solutions help you understand how to write answers correctly within the given timeframe. Moreover, class 12 CBSE sample papers make studying easier and more effective. When you include them in your study plan, they can greatly boost your confidence for the final board exam.
Check Out: CBSE Class 12 Books
CBSE Class 12 Biology Syllabus
CBSE sample papers for class 12 cover all the topics from every unit and chapter as per the updated biology syllabus. That's why, by solving them on a regular basis, you can easily revise the full syllabus and understand which chapters are most important for the board exams. Class 12 CBSE sample papers also help students know how questions are asked from each topic. Check the detailed CBSE Class 12 Biology Syllabus here:
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CBSE Class 12 Biology Syllabus |
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Unit |
Chapter |
Key Topics Covered |
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Unit VI – Reproduction |
Chapter 1: Sexual Reproduction in Flowering Plants |
Structure of flower; development of male and female gametophytes; pollination (types, agencies, examples); outbreeding devices; pollen-pistil interaction; double fertilization; post-fertilization events – development of endosperm, embryo, seed, and fruit; apomixis, parthenocarpy, polyembryony; importance of seed dispersal and fruit formation. |
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Chapter 2: Human Reproduction |
Male and female reproductive systems; microscopic anatomy of testis and ovary; spermatogenesis and oogenesis; menstrual cycle; fertilisation, embryo development up to blastocyst, implantation; pregnancy, placenta formation; parturition; lactation. |
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Chapter 3: Reproductive Health |
Importance of reproductive health; prevention of STDs; birth control and contraception; medical termination of pregnancy (MTP); amniocentesis; infertility; assisted reproductive technologies – IVF, ZIFT, GIFT. |
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Unit VII – Genetics and Evolution |
Chapter 4: Principles of Inheritance and Variation |
Mendelian inheritance; incomplete dominance, co-dominance, multiple alleles; inheritance of blood groups; polygenic inheritance; chromosome theory; sex determination (humans, birds, honey bee); linkage and crossing over; sex-linked inheritance; genetic disorders – thalassemia, Down’s, Turner’s, Klinefelter’s syndromes. |
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Chapter 5: Molecular Basis of Inheritance |
DNA and RNA as genetic material; DNA structure, replication, transcription, translation; Central Dogma; genetic code; gene expression and regulation (lac operon); genome projects; DNA fingerprinting. |
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Chapter 6: Evolution |
Origin of life; evidence of evolution; Darwin’s theory; modern synthetic theory; mutation, recombination, natural selection, gene flow, genetic drift; Hardy-Weinberg principle; adaptive radiation; human evolution. |
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Unit VIII – Biology and Human Welfare |
Chapter 7: Human Health and Diseases |
Pathogens and diseases (malaria, dengue, typhoid, pneumonia, etc.); immunology and vaccines; cancer, HIV/AIDS; adolescence issues – drug and alcohol abuse. |
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Chapter 8: Microbes in Human Welfare |
Role of microbes in food processing, industry, sewage treatment, energy generation, biocontrol, and biofertilizers; antibiotic production and use. |
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Unit IX – Biotechnology and Its Applications |
Chapter 9: Biotechnology – Principles and Processes |
Genetic engineering, recombinant DNA technology, steps and tools of biotechnology. |
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Chapter 10: Biotechnology and Its Applications |
Use of biotechnology in health and agriculture; insulin and vaccine production; stem cell technology; gene therapy; GMOs; Bt crops; transgenic animals; biosafety, biopiracy, and patents. |
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Unit X – Ecology and Environment |
Chapter 11: Organisms and Populations |
Population interactions – mutualism, competition, predation, parasitism; population growth, birth rate, death rate, age distribution. |
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Chapter 12: Ecosystem |
Components of ecosystem: productivity, decomposition, energy flow; ecological pyramids of number, biomass, and energy. |
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Chapter 13: Biodiversity and Its Conservation |
Concept and importance of biodiversity; loss and conservation; hotspots, endangered species, extinction, biosphere reserves, national parks, sanctuaries, Ramsar sites. |
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PW CBSE Class 12 Sample Papers Biology
PW CBSE Class 12 Sample Papers Biology includes important biology past year questions, stepwise marking schemes, and detailed solutions. You can check and access the CBSE Class 12 Biology Sample Papers by PW from the link given below.
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PW CBSE Class 12 Sample Papers Biology |
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CBSE Class 12 Sample Papers For Biology, Physics, Chemistry & English Core Combo Set of 4 |
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CBSE Class 12 Last 3 Years (2022 - 2024) Solved Papers For 2026 |
Why Should You Use the PW Biology CBSE Sample Paper Class 12?
PW's biology CBSE sample paper class 12 is designed to help you boost your board exam preparations. These papers follow the latest CBSE pattern and syllabus, making them perfect for your revision sessions. Let's understand the key reasons why you should use these CBSE Class 12 sample papers biology for 2026 exams:
Follows the Latest CBSE Class 12th New Pattern
CBSE class 12 biology sample papers are made as per the updated CBSE new exam pattern and marking scheme. This helps you learn how marks are given and how to write answers in the right format.
Interactive CBT-Based Practice
You get to solve 7 online CBT-based CBSE sample papers class 12 with detailed explanations. You can practice anytime and track your progress easily.
Includes CBSE Class 12th Biology Past Year Questions
The Biology CBSE sample paper class 12 has many questions from previous board exams. Solving them helps you understand what kind of questions are generally asked and which topics are repeated.
Handwritten CBT Sample Papers via QR Codes
Access the 3 handwritten sample paper CBSE Class 12th using QR codes. It’s an easy way to practice like you would in an exam.
Cheat Sheets and One-Shot Revision Videos
Quickly revise important points with cheat sheets and one-shot revision videos included in CBSE Class 12 sample papers.
Comparative Analysis of CBSE Sample Question Papers
Check trends and important topics by comparing CBSE sample papers for class 12 from 2024, 2025, and 2025-26.
Covers Complete Biology Syllabus
Each sample paper has questions that cover all chapters from the syllabus, including Reproduction, Genetics, Evolution, Biotechnology, and Ecology. This helps you revise all the topics in one place.
Sample Papers for All Levels
The sample paper CBSE Class 12th set has questions of easy, medium, and hard levels. You can start from simple ones and slowly move to tougher papers to build confidence.
Step-by-Step Marking Help
Every CBSE sample papers class 12 explains the marking scheme of the actual examination. It tells how marks are given for each step of an answer, helping students understand what examiners expect in the final exam.
Easy Solutions for Practice
CBSE Class 12 sample papers biology come with simple and easy-to-understand solutions. These help you learn the best way to write answers so that you score well.
Check Your Own Progress
After solving class 12 CBSE sample papers, you can check how much you have improved. This helps you know your weak points and work harder on them before the final board exam date.
Also check: Class 12 Question Banks
How to Score 90+ in Biology Using CBSE Sample Papers for Class 12
If you're aiming for 90+ marks in biology, it is important for you to study in the right way. CBSE Sample Papers for Class 12 Biology can help you a lot in this. They give you a clear idea of how questions are asked, what topics are important, and how marks are given in the board exam.
Here are some effective tips on how to score 90+ in Biology using CBSE sample papers for class 12th:
1. Know the Biology Class 12 Syllabus Well
Before you start solving CBSE class 12 biology sample papers, go through the complete syllabus once. Know which chapters carry more marks because this helps you plan your studies better and focus more on scoring topics.
2. Focus on NCERT-Based Questions
In the Class 12th Board exams, almost all the questions come from the NCERT book. So, using the sample paper CBSE Class 12th and your NCERT book, revise every diagram, definition, and concept. Practice drawing labelled diagrams, because they are also asked in the exam.
3. Revise Through Sample Paper Practice
When you solve CBSE Class 12 Sample Papers Biology regularly, you revise the key topics from the biology syllabus many times without even realising it. Each paper gives you a full-length assessment of what you have studied.
4. Work on Time Management
Try to finish each sample paper CBSE class 12th within three hours, just like the real exam. This builds your speed and confidence. Always check your answers after solving to see which questions took more time and where you could have saved time.
5. Write To-The-Point Clear Answers
Biology is mostly a theoretical subject, so long answers are only needed when they carry higher marks. While practicing from the sample paper CBSE Class 12th, learn how to write short and to-the-point answers. Use correct biological terms and underline key words. This helps in scoring more marks.
6. Revise Diagrams and Labelling
In biology, diagrams are very important. Many questions in class 12 CBSE sample papers are based on labelling or drawing. Practice diagrams from every chapter daily. Make sure they are neat and properly labelled.
7. Pay Extra Attention to Repeated Questions
When you solve many CBSE sample papers for class 12, you will notice that some topics or question types are asked again and again. Revise them carefully because there is high chance of similar questions coming in the upcoming board exam.
8. Manage Your Time Wisely
During practice, divide your three hours properly. For example, use the first few minutes to read all the questions, and then start with the ones you're sure of. This will train your mind to plan and answer all questions efficiently.
Read More: Class 12 Biology Previous Year Question Papers with Solutions PDF
CBSE Class 12 Sample Papers Biology FAQs
Q.1. What are the PW CBSE Class 12 Sample Papers Biology?
Ans. PW CBSE sample papers for class 12 are like practice papers made for students to prepare for the 2026 board exams. They follow the latest CBSE pattern and include important questions, solutions, and marking schemes.
Q.2. Do CBSE sample papers class 12 follow the updated biology syllabus?
Ans. Yes. All CBSE class 12 biology sample papers follow the updated CBSE syllabus and exam pattern. They cover all units and chapters, including Reproduction, Genetics and Evolution, Biotechnology, Ecology, and Human Welfare.
Q.3. When should I solve CBSE sample papers for class 12 board?
Ans. It is best to start solving class 12 CBSE sample papers after finishing your NCERT books. You can practice one paper every week to check your learning and exam preparation level.
Q.4. Are CBSE Class 12 sample papers enough to score well in biology?
Ans. CBSE Class 12 sample papers are very helpful, but they work best with NCERT textbooks. So, use Class 12 Biology sample papers for practice after reading the core concepts from the books.
Q.5. Which unit from the CBSE Class 12 Biology syllabus carries the highest marks?
Ans. As per past exam analysis, the unit Genetics and Evolution carries the highest marks, around 20. Other important units are Reproduction, Biotechnology, and Ecology, which also carry high-mark questions.
