See the exam is divided into 4 parts and has 15 questions from Each Subject.

Physics - 15 Questions

Chemistry -15 Questions

Maths- 15 Questions

Biology - 15 Questions

No Sectional Cut Offs .

Most of the students who appear in the IISER Aptitude Test will have either PCM or PCB in Class 12 and only few will have PCMB as subject and they might have an edge over other students.

If you are a PCM Student - You can really do good in PCM Questions + Study NCERT Level Biology

The Syllabus is

1. Diversity in the living world
2. Structural organization in animals and plants
3. Cell structure and function
4. Plant physiology
5. Human physiology
6. Reproduction
7. Genetics and evolution
8. Biology and human welfare
9. Biotechnology and its application
10. Ecology and environment

If you are PCB Student - You can really do good in PCB Questions you will not be able to study maths as the Maths is not based on Class 10 Mathematics. Biology can be studied and understood but understanding Mathematics Concept would be a little difficult if the students have less time in Hand.