There are many colleges and university offer B.Tech in Biotechnology with PCB background in 12th standard.

A list of few best are as follows:-

1-Amity Institute of Biotechnology, Noida,UP

2-IIT,New Delhi

3-IIT,Kharagpur,WB

4-Dr.D.Y. Patil Vidyapeeth,Pune

5-Rashtriya Vidyalaya College of Engineering,Bangalore

6-Buddha Institute of Technology & Science Research College,Jodhpur

7-GGS Indraprastha University,New Delhi

8-VIT, Vellore

Best of Luck!!!