There are many colleges that offers B.Sc in biotechnology . Unless you tell the name of the college you want to take admission, we can't answer you correctly.
Mainly, the fees for government colleges in very less, almost 30-50k for total course. For private and autonomous institutes the fees is a bit higher.
The cutoff depends on the exam, so unless you tell the name of the exam, how can we answer.
Hope you understand.