Dear Sai
Don't fear about that course. You can simply clear that course, if you do have interest in that course. But it also depends on your college and lectures.
All the best.

Dear

As per your interest in Biotechnology first year maths part you can do easily and later on with foundation of biotechnology subjects you can do well but this is research field and good opportunities and salary in research will be after PhD level only.

And your more time spend in lab work if you can manage your time Accordingly enter into the field.

All the best

It depends on your interest also. It is not a tough subject generally B.Sc students apply for the course.
Biotechnology is a field of applied biology that involves the use of living organisms and bioprocesses in engineering, technology, medicine and other fields requiring by-products. You can go for it.