For this application form bio is cumpalsury in 11&12th class
For IISER Admission,they conduct the admission in three channels:-
a)KVPY
b)SCB
c)JEE
Now if you opt for the SCB Channel,they have questions from 4 sets Physics, Chemistry, Mathematics and Biology. So if you have Biology in your 11th and 12th,that would be a plus point for you.For further details and to know more about the eligibility criteria please follow the link:-
https://www.google.com/amp/s/engineering.careers360.com/articles/iiser-admission/amp
Comment below for more queries.
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Can we give IISER aptitude test in class 11
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