Science

Yes, you can definitely pursue your BBA. But be careful while choosing your college or university as it will also impact a lot in your future.

I think for Engineering and most of the courses you should have at least a minimum of 60%aggregate in PCM to be eligible for admission. But particularly, I will suggest you to contact the admission department of the college you are interested to take admission.

AIIMS only provide M. Biotech in the stream of biotechnology which is a master's degree. The college which provides B.Tech Biotech like IITs, NITs, CFTIs and GFTIs etc. You have to gone through JEE-Mains then JEE Advanced. The 12th subjects combination for JEE Main for Biotechnology is given below.

Yes, you have a chance to get bioinfo. Maybe if you won't get in 1at counselling try for the next.