Hi, Actually B.Tech Biotechnology is offered by many institutes however all the admissions take place through the engineering entrance exams which have Maths, Physics and Chemistry.  Since you are studying PCB, you could try VITEEE and SRMJEEE as these entrance exams do allows for PCB students only for B.Tech Biotechnology. Check the details for VITEEE herehttps://engineering.careers360.com/articles/viteee and for SRMJEEE here https://engineering.careers360.com/articles/srmjeee. The application forms are now available for these. If you are open to appearing for exams with PCM then all major engineering entrance exams can be looked at.