CBSE 12th

You may refer-
https://www.mjrpuniversity.ac.in/how-to-apply.html.

Yes, you are eligible as anyone should complete his/her 12th from a recognised board and the admissions are on basis of the marks obtained in IIT JAM. Please click this link for more and detailed information- https://www.shiksha.com/science/course/integrated-b-sc-m-sc-in-mathematics-and-computing-indian-institute-of-technology-kharagpur-297637.

You must have 10+2 from a recognized board or 3 year Polytechnic Diploma.

Yes, it will be mentioned on the report card.

Please refer the link below for details :
https://www.shiksha.com/it-software/ranking/top-bca-colleges-in-ahmedabad/96-2-0-30-0

You need to have passed class 12th with minimum 50% marks.

Can you please elaborate your question. In which college/institute you wish to apply?

In which course do you wish to apply? Please specify.

No. CA Foundation Exam is the entrance level test in the Chartered Accountancy course and also it is replacing the existing entrance level CPT (Common Proficiency Test). It is part of revised curriculum announced by ICAI and taken into place w. e. f 1st July 2018. For more details see at
https://cacourse.net/ca-foundation-may-2019-registration-eligibility-fees-and-time-table/.

Hi,
Biotechnology is indeed very nice field!
Biotechnology includes research and development in recombinant DNA technology. So if you want to do research, then biotechnology is gonna provide world's best research centers. If you gain your degree in biotechnology from one of the reputed college, then of course you will get a chance for research in India as well as out of India also. Go for it. You have chosen a very creative field!
All the best:-)