SRM Institute of Science and Technology Kattankulathur Chennai Answered Questions

Admissioon to B.Tech Biotechnology is based on marks in 10+2:
Minimum 50% aggregate in PCM/PCB.
(i) Passed in higher secondary examination (10+2 pattern) or appearing in higher secondary examination in the current academic year with Physics, Chemistry and Mathematics or Biology or Biotechnology as major subjects in the regular stream from any state board within India, CBSE, ISCE, Matriculation, or NIOS
(ii) International Baccalaureate (IB) A-level with Physics, Chemistry, Mathematics or Biology as major subjects in any International schools within India
Note: Only those Candidates who have passed the above qualifying examination in not more than 2 attempts including appetence for improvement will be considered for admission.

If you are getting PES-Bangalore, go for it. The above 4 institutes are good. But if we arrange them in preference order so it is like PES-Bangalore, SRM-Chennai and Amity-Noida, and VIT-Bhopal. Choose wisely. See their rankings, review, placements, faculty, etc.
Good luck.

http://www.srmuniv.ac.in/admission-india/management/admission-procedure-admission-criteria
Please check if you match all the criteria for admission in SRM and according to your question this course is available only in the main campus. Have a look on the course available:
http://www.srmuniv.ac.in/admission-india/management/programs-offered

Eligibility for B.Tech Biotechnology, B.Tech Biomedical Engineering and B.Tech Genetic Engineering:
Minimum 50% aggregate in PCM/PCB
(i) Passed in higher secondary examination (10+2 pattern ) or appearing in higher secondary examination in the current academic year with Physics, Chemistry and Mathematics or Biology or Biotechnology as major subjects in the regular stream from any state board within India, CBSE, ISCE, Matriculation, or NIOS
(ii) International Baccalaureate (IB) A-level with Physics, Chemistry, Mathematics or Biology as major subjects in any international school within India
Note: Only those candidates who have passed the above qualifying examination in not more than 2 attempts including appetence for improvement will be considered for admission.