INBO Previous Year Question Paper, Free PDF Download Link
Priyanka Dahima12 Jan, 2026
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INBO Previous Year Question Paper: INBO Question Paper with Solutions has answers to all the questions asked in the previous paper. The INBO (Indian National Biology Olympiad) will help students face the exam.
Students will get step-by-step answers and explanations of the INBO Previous Year Question Paper. The answers are designed by highly experienced experts and students can use them to estimate the marks they can score in the exam. Scroll down our page to get the details of the INBO Previous Year Question Paper.The INBO Examination is going to be held on 1st February 2026 and it is very important to go through the INBO Previous year papers. Once students solve these papers, they may act vigilantly for the INBO Preparation.
INBO Previous Year Question Papers
INBO Previous Year Question Papers help students understand the difficulty level of the questions that will be asked and manage the time to answer all the questions in the exam. Students can download previous papers of the Indian National Biology Olympiad from the official website of Homi Bhabha Centre for Science Education and prepare for the exam preparation. Read this article to learn about INBO PYQP benefits, Exam Pattern, Syllabus, and more.
INBO Previous Year Question Papers PDF
The INBO question consists of multiple choice questions and no long questions. The main focus is human horticulture, genetics, and plant horticulture at INBO. The INBO syllabus is CBSE Class 11 and Class 12 Biology. In the below table, you can find the download links of the INBO Previous Year Question Papers PDF along with the solutions.INBO Previous Year Questions
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INBO Previous Year Answer Keys
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INBO 2026 Exam Pattern
INBO 2026 exam will be conducted in offline mode as a pen-and-paper test for a duration of 2 hours, with a total of 100 marks. The paper will assess advanced concepts from Class 11 and 12 Biology through a mix of objective and descriptive questions designed to test conceptual clarity, application, and analytical skills.
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INBO 2026 Exam Pattern |
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Feature |
Details |
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Exam date |
1 February 2026 (1:30 PM – 3:30 PM IST) |
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Mode of exam |
Pen and paper, offline |
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Duration |
2 hours (120 minutes) |
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Total marks |
100 marks |
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Question type |
Mixed: Objective (MCQs) + Subjective/analytical questions |
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Sections |
Section A: 28 questions (1 mark each); Section B: 27 questions (72 marks) |
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Negative marking |
Applicable for incorrect answers in objective section |
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Syllabus level |
Advanced Class 11–12 Biology (Olympiad level) |
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INBO Syllabus
The INBO Syllabus 2026 is the same as last year. Students can use this as a starting point for their test preparation. To participate in INBO, students must have a degree in chemistry. They should start with the core subjects of classes 7 to 10 to gain deep experience and understanding. The INBO Syllabus is similar to the modern CBSE syllabus. To strengthen the fundamentals, one should be well-versed with school study materials from classes 11 and 12, including the NCERT.
- Cell Biology: Study of cells, their structure, functions, and organelles.
- Genetics: Understanding of genes, heredity, DNA, RNA, genetic disorders, and genetic engineering.
- Biotechnology: Application of biological processes in technology, including areas like genetic engineering, bioremediation, and biopharmaceuticals.
- Evolution: Understanding the process of evolution, natural selection, adaptation, and speciation.
- Plant Biology: Study of plant structure, growth, reproduction, and adaptations to various environments.
- Ecology: Examination of interactions between organisms and their environment, ecosystems, biodiversity, and conservation.
- Physiology: Study of how living organisms function, including topics like respiration, digestion, circulation, and nervous system.
- Animal Biology: Examination of animal anatomy, physiology, behavior, and diversity.
- Microbiology: Study of microorganisms, including bacteria, viruses, fungi, and their roles in ecosystems and human health.
- Immunology: Understanding the immune system, immunity, vaccines, and immune responses to pathogens.
Importance of INBO Previous Year Paper
Students who are going to appear for INBO can gain from the following advantages by downloading the INBO Previous Question Papers.
- The INBO Previous Year Paper will help you identify your strengths and weaknesses, as well as the Exam Pattern and marking scheme of the test.
- The more quickly you address issues, the more proficient your time management abilities will become.
- By resolving INBO PYQ, students will become acquainted with important questions.
- Students are better able to arrange their studies when they analyse the INBO PYQ and their solutions.
- Students can grasp the techniques they are given when they are aware of their strengths and shortcomings.
Advantages of the INBO Answer Key
Analysing the INBO Answer Keys is important for achieving success in the Indian National Biology Olympiad. Using the INBO Answer keys, candidates may determine the right responses to the INBO exam questions. Students are given a self-assessment tool that allows them to evaluate their answers and identify areas of difficulty. INBO answer keys are great for learning the correct techniques and strategies to solve Biology questions. By looking at answers and answer keys, candidates can refine their thinking and improve their problem-solving skills.