Hello dear aspirant

Hope you’re doing well

To do B.sc biotechnology from university of Delhi, you will have to fill their application form. The admission is given on merit basis.
the eligibility criteria to apply is that the student must ha e a minimum aggregate of 55% in class 12th in science stream.

Then the cut offs are released and you can go and get admission in the college where you clear the cut off.

but, unfortunately you missed the last date to apply in tje year 2021. Last date was 31august 2021.

You can try next year or look for other universities which offer B.sc biotechnology

You can find the names of more colleges or universities in the below attached link

https://university.careers360.com/colleges/list-of-bsc-in-biotechnology-universities-in-india

Good luck