Indian National Biology Olympiad (INBO)
by Homi Bhabha Centre for Science Education (HBCSE)
₹5,000 Cash Award for OCSC
300 participants
The Indian National Biology Olympiad (INBO) is Round 2 in India’s four-stage selection for the International Biology Olympiad. Organized by HBCSE with IAPT & ATBS support, it tests high-school students selected from NSEB via advanced theory questions.
Mode
In-Person
Fee
Free
Participation format
Individual
Duration
2-3 hours
Time needed
2-hour exam
Eligibility
Open to Indian citizens in Classes 10-12 who have qualified through the National Standard Examination in Biology (NSEB). Students must be studying in India and meet the age criteria for the International Biology Olympiad.
- Grade level
- Grade 10 to 12
- Age range
- 14 to 19 years
- Eligibility region
- Available nationwide across India
- Academic requirement
- Students must be enrolled in Class 10, 11, or 12 in an Indian school.
- Prerequisites
- Must qualify the National Standard Examination in Biology (NSEB).
See if your child qualifies.
Rewards and recognition
Award
₹5,000 Cash Award
Cash awards of ₹5,000 are provided to students who are selected for and perform well at the Orientation-cum-Selection Camp (OCSC), which is the stage after INBO.
Prizes
Medals for OCSC Qualifiers
Medals are awarded to students who are selected for and perform well at the Orientation-cum-Selection Camp (OCSC), the stage after INBO.
Certificate
Certificate of Merit from HBCSE
A certificate of merit is awarded to all students who qualify for and participate in the INBO, issued by the Homi Bhabha Centre for Science Education (HBCSE).
Opens doors to
Significantly strengthens applications for admission to premier Indian institutions like IISc, IISERs, and top international universities for life sciences, providing a competitive edge.
Career pathways
Participation opens doors to promising careers in scientific research, medicine, biotechnology, and academia, recognized by top research institutions.
Recognition
International & National Recognition
Skills your child builds
Key dates
- Registration opened
- 21 Aug 2026
- Registration closed
- 14 Sept 2026
- Competition
- 31 Jan 2027
- Results
- 28 Feb 2027
NSE Centre Registration Opens
Examination centers can begin their registration process for the National Standard Examinations (NSE) series. (All dates are in IST)
NSE Centre Registration Closes
Final deadline for examination centers to complete their registration for the NSE exams. (All dates are in IST)
NSEB 2026 Examination Date
The first stage examination, National Standard Examination in Biology (NSEB), will be conducted from 14:30 to 16:30 hrs. (All dates are in IST)
NSEB 2026 Result Announcement
Results and scorecards for the National Standard Examination in Biology (NSEB) will be released. (All dates are in IST)
INO Selection List Publication
The list of students selected for the Indian National Olympiad examinations, including INBO, will be published on the official website. (All dates are in IST)
INBO Admit Card Registration Starts
Eligible students must register on the HBCSE website to obtain their INBO admit cards. This is a mandatory step. (All dates are in IST)
INBO Admit Card Download Deadline
Last day for eligible students to download their INBO admit cards from the HBCSE Olympiad website. (All dates are in IST)
Indian National Biology Olympiad (INBO) Exam
The Indian National Biology Olympiad (INBO) examination will be conducted from 13:30 to 15:30 hrs. (All dates are in IST)
INBO Result Announcement
Results for the Indian National Biology Olympiad (INBO) will be declared. (All dates are in IST)
HBCSE Exam Center, Mumbai, Maharashtra
How to apply
- 1Students are not required to apply for INBO directly. Selection is based on performance in the National Standard Examination in Biology (NSEB). Top performers from NSEB are automatically eligible to appear for INBO.
Rules and guidelines
- Participants must be Indian citizens and hold a valid Indian passport to be eligible for selection to the international level.
- Students cannot appear for both NSEJS (Junior Science) and NSEB in the same year.
- Selection for the next stage (OCSC) is based strictly on the merit list of the INBO examination.
- All participants must adhere to the code of conduct set by the examination authorities at the test centers.
About this opportunity
The Indian National Biology Olympiad (INBO) is the critical second stage for selecting the Indian team for the International Biology Olympiad (IBO). Organized by the Homi Bhabha Centre for Science Education (HBCSE), this exam tests deep conceptual understanding, analytical reasoning, and problem-solving skills in biology.
Participation is exclusively for students who qualify through the National Standard Examination in Biology (NSEB). Top performers advance to the Orientation-cum-Selection Camp (OCSC), with the ultimate goal of representing India on a global stage.
Exam format
- Total marks
- 100
- Duration
- 120 minutes
- Format
- The paper consists of multiple-choice questions (MCQs) and detailed questions, covering both theoretical and analytical problems.
- Language
- English
Rounds and format
The Indian Biology Olympiad programs is the 2nd stage. below are five-stage process: Stage 1: National Standard Examination in Biology (NSEB) Stage 2: Indian National Biology Olympiad (INBO) Stage 3: Orientation-cum-Selection Camp (OCSC) Stage 4: Pre-departure Training (PDT) Stage 5: International Biology Olympiad (IBO)
How entries are judged
Selection is based on the marks obtained in the written examination. A merit list is prepared, and the top students are selected for the next stage.
Selection process
Students are selected based on their performance in the INBO exam. A merit list is prepared, and approximately the top 35-40 students are invited to the Orientation-cum-Selection Camp (OCSC).
How to prepare
- NCERT textbooks for classes 11 and 12.
- Advanced biology textbooks like 'Campbell Biology'.
- Previous years' INBO and NSEB question papers available on the HBCSE website.
Academic details
Difficulty: Advanced
What's covered
The syllabus is broadly equivalent to the senior secondary level (Class XI and Class XII) of the CBSE Biology curriculum, but questions are non-conventional and of a higher difficulty level, requiring a deeper understanding of concepts.
Frequently asked questions
How can students effectively manage the competitive pressure of the INBO?
Students can manage competitive pressure by focusing on consistent preparation, practicing mindfulness techniques, and maintaining a balanced routine that includes adequate rest and recreational activities. Setting realistic goals and celebrating small achievements can also be beneficial.
What are the common mistakes participants make during the INBO examination?
Common mistakes include misinterpreting questions, poor time management, neglecting to review answers, and lacking a deep conceptual understanding beyond rote memorization. Thorough practice with diverse problem types can help mitigate these issues.
How does participation in INBO impact a student's long-term academic and career prospects?
Participation in INBO significantly enhances a student's academic profile, demonstrating advanced scientific aptitude and critical thinking. This recognition can strengthen applications for prestigious higher education institutions and open doors to research-oriented careers in biology and related fields.
What strategies are most effective for preparing for the advanced theoretical questions in INBO?
Effective strategies involve a deep dive into advanced biology concepts, extensive problem-solving practice, analyzing previous years' question papers, and engaging in discussions with mentors or peers to clarify complex topics. Focusing on application-based learning is crucial.
How do students transition from NSEB to the more challenging INBO stage?
The transition requires a shift from broad knowledge to in-depth conceptual understanding and analytical application. Students should focus on advanced topics, practice complex problem-solving, and develop strong critical thinking skills to tackle the higher difficulty level of INBO.
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