NSEB Exam Date 2025 Out: The much-awaited NSEB Exam Date 2025 has been announced for the students who have completed the registration process for the NSEB Exam 2025, which is the first stage of the International Biology Olympiad.
NSEB Exam 2025 will be conducted on November 23, 2025 (Sunday) between 2:30 am to 4:30 am. The National Standard Examination in Biology (NSEB) 2025 is held for students of Classes 11 and 12. The NSEB Admit Card 2025 will be released about 15 days before the exam date for candidates who have successfully registered for the Biology Olympiad.
This exam is organized by the Indian Association of Physics Teachers (IAPT) in partnership with the Homi Bhabha Centre for Science Education and will be conducted at various exam centers across the country.
NSEB Exam Date 2025 Out
The National Standard Examination in Biology (NSEB) is conducted by the Indian Association of Physics Teachers (IAPT) in collaboration with the Homi Bhabha Centre for Science Education. It is a two-hour written test consisting of 60 multiple-choice questions.
As per the official schedule, the NSEB 2025 will be held on November 23, 2025 from 2:30 PM to 4:30 PM. Each year, around 20,000 to 60,000 students from Classes 11 and 12 participate in this exam. Based on their performance, candidates are shortlisted for the Indian National Biology Olympiad (INBO).
The NSEB is designed for students who have a keen interest in Biology and love solving challenging questions. It not only tests their knowledge at the regional level but also prepares them for international competitions, offering them a platform to showcase their skills and passion for the subject.
Check: How to Prepare for NSEB?
NSEB Biology Olympiad Date 2025
The National Standard Examination in Biology (NSEB) 2025 is tentatively scheduled to be held on November 23, 2025 from 2:30 PM to 4:30 PM. Registration for NSEB 2025 begins on August 21, 2025, and the NSEB Registration Last Date is September 14, 2025.
Keep all the NSEB 2025 Important Dates in mind. Here we have provided the essential details of the NSEB Biology Olympiad Date 2025 for the students who are willing to appear for the exam.
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NSEB Biology Olympiad Date 2025
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Organization
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IAPT (Indian Association of Physics Teachers) in collaboration with HBCSE (Homi Bhabha Centre for Science Education),
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Exam Name
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National Standard Examination in Biology (NSEB) 2025
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NSEB Exam Date 2025
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23rd November 2025
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NSEB Exam Timing
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02.30 pm to 4.30 pm
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Mode of Exam
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Pen and Paper Based (Offline)
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No of Questions
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Multiple Choice Questions (MCQs) - 60 Questions
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Total Marks
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216
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Negative Marking
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For each wrong response, one mark will be deducted.
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Official Website
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https://www.iapt.org.in/
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NSEB Exam Pattern 2025
To succeed in the NSEB Examination 2025, students must first understand the exam pattern clearly. Before beginning their preparation, it’s important to go through the structure of the paper.
As per the NSEB Exam Pattern 2025, the paper includes:
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48 multiple-choice questions with only one correct answer — each correct answer carries +3 marks, while each wrong answer results in a -1 mark deduction.
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12 multiple-choice questions that may have one or more correct answers — to earn marks for these, students must select all the correct options without choosing any incorrect ones.
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NSEB Exam Pattern 2025
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Exam Timings
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2:30 pm to 4:30 pm (tentative)
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Duration of Exam
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Two hours
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Test Paper Level/ Syllabus
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Is broadly equivalent to senior secondary level (up to and including Class XII) of CBSE India
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Test Medium/ Language
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Question paper will be in English & Hindi (Option during registration). Type of questions – Objective type with multiple choices
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Sections
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Two parts
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Total Number of Questions
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60 MCQs
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Total Marks
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216 Marks
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NSEB Syllabus 2025
The NSEB Syllabus 2025 follows the CBSE syllabus for Class 11 and 12 and the details are discussed here.
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NSEB Syllabus 2025
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Chapters
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Topics Included
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Diversity Of Living
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Structural Organization in Animals and Plants
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Cell: Structure and Function
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Plant Physiology
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Human Physiology
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Digestion & Absorption
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Breathing & Exchange Of Gas
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Body Fluids and Circulation
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Excretory Products and Their Elimination
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Locomotion and Movement
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Neural Control and Coordination
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Chemical Coordination and Integration
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Reproduction In Organisms
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Types, modes, and the process of reproduction
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Asexual reproduction
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Sexual reproduction
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Pre-fertilization events
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Fertilization and post-fertilization events
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Sexual Reproduction in Flowering Plants
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Flower Structure
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Morphology Of Flower
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The process of sexual reproduction in flowering plants.
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Development of male and female gametophytes
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Pollination
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Double fertilization
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Post fertilization Events-Development of endosperm and embryo
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Development and significance of seed and formation of fruit
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Human Reproduction
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Male and female reproductive systems
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Microscopic diagram elaborating anatomy of testis and ovary
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Gametogenesis − Spermatogenesis, Oogenesis
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Menstrual cycle
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Fertilization, implantation pregnancy, and placenta formation
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Parturition and Lactation
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Reproductive Health
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The need for reproductive health
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Prevention of sexually transmitted diseases (STD)
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Birth control − need and methods, contraception, Medical Termination of Pregnancy (MTP)
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Amniocentesis
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Infertility and assisted reproductive technologies
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Principles Of Inheritance And Variation
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Covers the topics of Genetics and Evolution
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Similarity and variation between the parents and offspring
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Mendel”s law of inheritance
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Sex determination
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Mutations genetic disorders
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Molecular Basis of Inheritance
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DNA as genetic material
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Structure of DNA and RNA
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DNA- packaging, replication, fingerprinting
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Central dogma, Transcription, genetic code, translation
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Gene expression and regulation − Lac Operon
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Genome and human genome project
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Evolution
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Darwin’s contribution
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Modern Synthetic Theory of Evolution
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Mechanism of evolution − Variation, Natural Selection and types of natural selection
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Gene flow and genetic drift
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Hardy – Weinberg’s Principle
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Adaptive Radiation
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Human Health And Diseases
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Maintenance of optimum health
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Diseases- types, treatment, and prevention
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Immunity and its types
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Adolescence, drug and alcohol abuse
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Strategies for Enhancement in Food Production
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Improvement in food production techniques
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Plant breeding, Tissue culture
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Single-cell protein
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Biofortification, Apiculture
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Animal husbandry
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Microbes in Human Welfare
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Biotechnology – Principles and Processes
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Biotechnology and Its Applications
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Organisms and Populations
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Organisms and environment- Habitat, Niche, Population and Ecological adaptations
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Population interactions- Mutualism, Competition, Predation, Parasitism
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Population attributes
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Ecosystem
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Ecological Patterns, components, productivity, decomposition
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Energy flow in the ecosystem
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Pyramids of number, biomass, energy
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Carbon and Phosphorous Nutrient cycles
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Ecological succession and services
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Biodiversity and Its Conservation
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Concept, Patterns, Importance, and loss of biodiversity
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Biodiversity conservation ways
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Environmental Issues
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Air and water pollution and its control methods
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Agrochemicals and their effects
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Solid waste management
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Radioactive waste management
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Greenhouse effect and climate change
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Ozone layer depletion
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Deforestation
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NSEB Admit Card 2025
The NSEB Admit Card 2025 will be released by the Indian Association of Physics Teachers (IAPT) in collaboration with the Homi Bhabha Centre for Science Education around 15 days before the exam date. Only candidates who have successfully registered for the National Standard Examination in Biology (NSEB) will be able to download their admit cards from the official website.
This hall ticket is a mandatory document for appearing in the exam, and without it, students will not be allowed inside the examination hall.
NSEB Previous Year Question Paper
NSEB previous years’ question papers are a great way for students to practice managing their time and get a clear idea of how tough the actual exam questions can be. Going through these papers helps them understand the exam pattern and prepare more effectively.
Students can download past NSEB papers from its official website and use them for practice. These papers, along with their answer keys, are also available through the link below for quick access in PDF format.
NSEB Previous Year Question Papers
NSEB Exam Preparation Tips
Here are the preparation tips for the NSEB Examination 2025
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Understand the exam: There are multiple choice questions in NSEB Exam, and data analysis. A wide range of subjects are required, with the free response section being the most difficult and there is a slight change in the Exam Pattern on annual basis.
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Start early: It will take a lot of time to learn, comprehend, and revise material covering so many topics. Make sure that you start well in time. An average of 2-4 hours of study time per day should be sufficient for you if you have six months to spare.
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Stay up to date with sites: In order to stay informed about the most recent developments and modifications to examination procedures, you must thoroughly review the sites. The most significant websites are the IAPT (Indian Association of Physics Teachers) site and the Homi Bhabha Center for Science Education website.
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Practice Diagrams well: Diagrams tend to take a lot of time. Be sure to practice them so well that you do not have to think too much in the examination.
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Know your reference books: A comprehensive list of reference books necessary for your preparation is given on the HBCSE site. Be sure to go through them well.
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Study your environment: Biology is the science of life, and you are surrounded by life. When you start thinking about the application of Biology to daily life, you get an entirely different perspective.
