Hello Namratha

I hope you are doing good. With reference to your query,  I would like to know you that Karunya insittute of technology offers 4 years btech course in biotechnology stream. Admission are done based on the rank scored KEE-entrance test conducted by the university . For to be eligible,you need to have 50 percent marks in your 12th  in aggregate

You can refer the following link for brief details

https://www.careers360.com/university/karunya-institute-of-technology-and-sciences-coimbatore/btech-biotechnology-course#:~:text=Bachelor%20of%20Technology%20(B.,sciences%2C%20chemical%20engineering%20and%20bioprocesses.

Hope you found this answer helpful. Good luck for your future