PSEB Class 12 Biology Model Paper 2026, Download PDF
The PSEB Class 12 Biology Model Paper 2026 features a 70-mark theory exam with 19 total questions divided into four sections (A to D). The new 2025-26 pattern reduces MCQs to 25% weightage and introduces compulsory diagram-based long answers and comprehension-style questions.
Key Points
- PSEB revised the Class 12 Biology exam pattern for the 2025-26 session.
- The 2026 exam emphasizes conceptual testing and diagrams.
- Model paper PDF is available on pseb.ac.in under 'Academic Wing'.
PSEB Class 12 Biology Board Exam 2026: To achieve a top score, students must adapt to the newly revised exam pattern released by the Punjab School Education Board for the 2025-26 academic session. This year, the board has shifted its focus towards NEP-aligned conceptual testing, emphasizing diagrams, case-based studies, and "inside-the-chapter" questions.
In this guide, we provide the official PSEB 12th Biology Model Test Paper 2026 PDF and a detailed analysis of the unit-wise weightage. Whether you are focusing on Genetics or Biotechnology, understanding this blueprint is the first step toward securing a 95+ score.
PSEB Class 12 Biology Model Paper 2026: Key Highlights
| Board | Punjab School Education Board (PSEB) |
| Class | 12 |
| Academic Year | 2025-26 |
| Subject | |
| Total Marks | 100 |
| Theory Marks | 70 |
| Exam Duration | 3 Hours |
| Sections | 4 sections A, B, C and D |
PSEB Class 12 Biology Model Paper 2026: Download PDF
Check below to know the PSEB Class 12 Biology Model Paper 2026 and students can even download the PDF for free.
Note:
a) Question paper will consist of four sections A, B, C and D with a total of 19 questions.
b) Section-A will contain question number 1 having 20 parts of 1 mark each. 12 questions will be of Multiple-choice question type, 4 fill in the blanks, 4 are True/false.
c) Section-B will contain questions number 2 to 11-total 10 short answer type questions of 2 marks each. Question 4,5,9,11 will have an internal choice.
d) Section-C will contain questions number 12 to 16 –total 5 questions of 3 marks each. Question 12 and 15 will have internal choice.
e) Section-D will consist of question 17 to 19 total 3 questions of 5 marks each. All the questions have 100% internal choice.
| Section A Q1) Each question carries one mark Multiple Choice Questions I. The nuclei present in the central cell of the embryo sac are called a. Egg Nuclei b. Antipodal nuclei c. Polar Nuclei d. Synergid nuclei II. Delivery of a developed fetus is scientifically called a. Parturition b. Ovulation c. Abortion d. Oviposition III. Disadvantages of amniocentesis is a. Determination of disease in advance b. Sex determination of unborn child c. Both a and b d. None of these IV. A cross between an F1 hybrid and any of its parents is a. Monohybrid cross b. Dihybrid cross c. Back Cross d. Test Cross V. Vertebrate forelimbs are examples of a. Homologous organs b. Analogous organs c. Vestigial Organ d. Nonfunctional organ VI. The genes causing cancer are a. Structural genes b. Promoter genes c. Oncogenes d. Regulatory genes VII. If the BOD of the water sample is very high, the sample is a. Highly polluted b. Less polluted c. Not polluted d. Portable VIII. Plasmids are used as cloning vectors because they a. Can be multiplied on culture b. Are self-replicating in bacterial cell c. Can be multiplied in the lab with the help of enzymes d. Replicate freely outside the cell IX. Golden rice is enriched with a. Vitamin A b. Vitamin K c. Vitamin C d. Vitamin D X. Mycohhroezais example of a. Antibiosis b. Mutualism c. Commensalism d. Parasitism XI. At each tropic level in which form energy is lost a. Heat b. Chemical c. Light d. Electrical XII. In national park protection is given to a. Flora only b. Fauna only c. Both Flora and fauna d. None of these Write True or False XIII. Copper T is used as a birth control device by women XIV. Sickle cell anaemia is an example of point mutation. XV. Vaccination is a type of innate immunity XVI. In gel electrophoresis DNA fragments separate according to their charge Fill in the blanks XVII. Zygote divides to form ……….which is implanted in uterine wall XVIII. Substances which cause allergy are called …….. XIX. Dragonflies are used as biocontrol agents to protect the crops from ……………. XX. Sacred groves is an example of…………... .conservation |
| Section B Each question carries 2 marks. Q2) Write two functions of tapetum. Q3) What are the major components of seminal plasma? Q4) Name two permanent methods of birth control. OR Expand ZIFT ICSI Q5) What do you mean by the law of segregation? OR What will the progeny be if a woman carrier for haemophilia marries a normal man? Q6) What is convergent evolution? Give an example Q7) Differentiate between innate and acquired immunity. Q8) Define sewage. Why is it harmful to us? Q9) What are bioreactors? Name its two types. OR Expand PCR. Mention its one importance in biotechnology. Q10) Write two advantages of GM crops. Q11) Write any two points of differences between grazing and detritus food chain. OR What do you mean by hotspots of biodiversity? |
| Section C Each question carries 3 marks Q12) What is DNA fingerprinting? Mention its two applications. OR Explain the structure of the transcription unit with a diagram. Q13) Write a short note on industrial melanism. Q14) Name the causing agent of Typhoid. Also write down its symptoms and modes of transmission. Q15) With the help of a diagram, show the steps of recombinant DNA technology. OR What is gene therapy? Illustrate using the example of adenosine deaminase deficiency. Q16) Name and explain the type of interaction between crown fish and sea anemone. |
| Section D Each question carries 5 marks Q17) Define Oogenesis. Briefly describe the process of Oogenesis with the help of labelled diagrams. OR Observe the given diagram and answer the following questions.
a) Which type of cell division occurs in the diagram marked A b) The two cells formed in B are called _______ c) In the figure marked C, four cells are formed. What are they? d) What happens to the cells marked C? e) What is the total process called? Q18) Describe the individuals with the following chromosomal abnormalities 1. Trisomy of chromosome 21 2. XXY 3. XO
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PSEB Class 12 Biology Model Paper 2026: Download PDF |
Why is the 2026 PSEB Biology Model Paper Different?
Following the latest NEP guidelines, the PSEB has shifted toward a more conceptual evaluation:
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Revised Question Source: For 2026, 25% of the questions will be framed from within the textbook content (Internal Paragraphs), while the remaining 75% will follow the standard exercise questions.
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Balanced Difficulty: The paper follows a 30-40-30 ratio—30% Easy, 40% Average, and 30% Difficult/Higher Order Thinking Skills (HOTS).
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Mandatory Diagrams: Section D (Long Answer) now strictly requires diagram/illustrative-based answers for at least two of the three 5-mark questions.
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New Section Type: Section D also includes a Comprehension-based question (typically from Chapter 12: Ecosystem) to test reading and analytical skills.
How to Download PSEB Class 12 Biology Sample Paper 2026 PDF?
Follow these simple steps to get your copy of the official model paper:
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Navigate to the official PSEB portal: pseb.ac.in.
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Go to the 'Academic Wing' section.
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Click on 'Model Test Paper 2025-26'.
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Select 'Class 12th' and click on 'Biology' to download the PDF.
The PSEB Class 12 Biology Model Paper 2026 is an indispensable tool for students aiming to score above 90%. With the board's shift toward conceptual depth, simply memorizing textbook exercises is no longer sufficient. Success in 2026 will require a balance of speed for the 28 objective questions and technical accuracy for organic conversions and physical chemistry formulas. Download the PDF today to begin your targeted revision.
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Apeksha Agarwal is an Education Journalist with over 3.5 years of experience. She covers a wide range of topics, including school board examinations, entrance tests, admissions, results, scholarships, and higher education updates. Over the years, she has closely tracked major examinations such as JEE Main, NEET UG, CUET, and various state-level entrance exams, helping students stay informed throughout their academic journey. Apeksha has a Master's degree in Journalism and Mass Communication and a certificate in Digital Journalism. She is passionate about transforming complex educational developments into clear, accessible, and useful information. Her reporting focuses on providing students, parents, and educators with accurate updates and practical insights on examinations, results, and policy changes. She believes that quality education journalism can make a meaningful difference by helping students make informed decisions about their future.
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