Hello there,
Yes, you can get Biotechnology in colleges of Vadodara with 57% aggregate in PCB.

You can apply in GSFC University, Vadodara. It requires minimum 45% aggregate in subject which includes chemistry, mathematics and biology. For aggregate 55% and above, they have the option of direct admission for BSc Biotechnology, that is, no entrance exam is required. So you can directly apply there without any entrance exam.

Another University offering Biotechnology is Parul University, Vadodara. This too is BSc Biotechnology. For admission there, you need to have passed your 10+2 level with physics,chemistry, and biology as compulsory subjects.

So you are eligible for both the colleges. There are 30 seats for biotechnology in these two colleges.

Hope this answer helps you.
Good luck!!