Colleges in Bangalore

Follow the link below for top BCA colleges:
https://www.shiksha.com/it-software/ranking/top-bca-colleges-in-bangalore/96-2-0-278-0
Listed below are the top MCA colleges in Bangalore:
1. RV College of Engineering (RVCE)
2. MS Ramaiah Institute of Technology
3. Bangalore Institute of Technology
4. Christ University
5. Presidency College
6. Acharya Institute of Management and Sciences
7. Nitte Meenakshi Institute of Technology
8. Kristu Jayanti College
9. New Horizon College of Engineering
10. Dayananda Sagar College of Management and Information Technology

I have very limited knowledge of the same. Therefore, I would request you to look at HRD's rankings, Times of India and Hindustan Times rankings.

To get M.Sc (biotechnology) in the mentioned institutions, you need to complete B.Sc and then qualify JAM. On the other hand, you can also sit for JEE Advanced for IITs and IISc and IISER aptitude test for IISER, but it is for integrated B.Sc+M.Sc.

The admissions are already closed for the academic year 2017. However you can try for the academic year 2018.

For UG courses the selection is mainly based on your performance in class 12. Some courses will have entrance test which will be based on your academics of class 12, skill assessment which is a written test on a general topic, micro presentation where you will have to talk on a given topic for 90 seconds (a list of topics will be given beforehand), personal interview with a panel of interviewers.
The selection process is different for every course. So if to get the right answer you will have to specify which course you want to know about.