HI Aspirant,

The top deemed University in TamilNadu for Biotechnology are:

• Indian Institute of Technology, Madras (IIT Madras)
• PSG College of Technology.
• SRM Institute of Science and Technology (formerly known as SRM University)
• D. G. Vaishnav College for Men.
• Sathyabama University.
• Sri Ramachandra Institute of Higher Education and Research (Deemed to be University

These are some of the good colleges with good faculty members and also good education.

Hope it helps!!