Hello aspirant,
Colleges for Bio-Technology in Tamil Nadu are
1) Vellore institute of Technology
2) PSG college of Technology
3)SASTRA University
4) SRM  UNIVERSITY
5) Vinayaka Missions University
6)PRIST University
7)VELS University
8) Hindustan Institute of Technology
9)Prathyusha Engineering College
10)Kamaraj College of engineering and technology