Colleges in Chandigarh

Chandigarh University is a whole private institute and yes, it offers a course in biotechnology under B.Sc-IT.
http://www.cuchd.in/biotechnology/bsc-biotechnology.php

Chandigarh University charges INR. 35000 per semester for B.Sc computer science as of current date.
http://www.cuchd.in/computing/bsc-computer-science.php

Since Chandigarh University is best MBA institute in Punjab, it surely will be a worth of doing it there. http://www.cuchd.in/management/mba-master-of-business-administration.php.

Yes! You can apply for M.Sc. After BCA and it is a good choice if you want to do Masters from CS field too.

CU has emerged as an attractive place to pursue this course in the last 3 years. They have actually developed a lot. It is important to note that the placements of today won't matter much for you when you complete your degree after 3/4 years. Still, for the question, I would suggest that you take the data from them as their online counsellors are available for such information. The Placements for a Bachelor Degree Holders are not very high anywhere in the Private University World. CU still have better chances to give you a placement, depending on your competence, in the future.

Yes, there are placement opportunities provided by the college. You can get profiles like Food technologist, Nutritional therapist, Product/process development scientist, Quality manager, Regulatory affairs officer, scientific laboratory technician or Technical brewer.
Top recruiters are Ananda, Barista, Cafe Cofee Day, Club Mahindra, Convergys, Crown Plaza, Hyatt Imperial, Jaypee Group, Le Meridian, McDonalds, and Oberoi etc.

Yes, according to your marks you're eligible for this university. Good luck!