Hello student,

For securing admission in IISER, you have to clear the individual cutoff of each subject. Hence, you need to attempt Biology as it is a part of the examination. It does not matter whether you are a PCM or PCB student, you have to answer and solve all the sections of IAT and clear individual subject cutoffs for admission.

I hope this helps, All the Best!

Hi Anjana

I hope you are doing well, It is not compulsory to attempt biology but they will consider its marks in the total I. e. your marks will be out of 180. If you are a PCM Student-