Colleges in Chennai

For Biotech course, SASTRA is the best university.

Yes, you are eligible for it, MCC says "graduate degree in any discipline with at least 50% marks."
The selection process is Meri Based.

Hello,
Refer the link:
https://www.shiksha.com/university/icfai-university-Dehradun-institute-of-chartered-financial-analysts-of-india-4071/admission?streamId=5.

The college has NCC as student activity. You can refer to the official website of the Anna University.

Admission in Anna University is based on 12th marks, mainly PCM.
50 marks physics and chemistry, 100 marks for maths which makes a total of 200, if you have like 195+ then you can get admission in top colleges of Anna University.

In my personal opinion, B.Tech + MBA doesn't make sense. They both are different stream courses. B.Tech is about technology and MBA is for management. You can also do MBA if you are not a Science student. But, you can't do engineering if you're not a Science student. Now, I would recommend you to fi

Yes, it totally depends on you if you want to prepare or not. There are several extra opportunities inside and outside VIT for GATE preparation. You will get a platform to improve yourself and prepare for GATE level.

Use college predictor to know about this
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Good luck.