Hi There,
Superb subject of study you have chosen. It has a niche in all sectors right from humans to animals to food and dairy to medicines etc.
Please note that Bioo-technology is completely a Reserach oriented field. Mainly pertaining to research and finding solutions towards exisiting fields.

Though your specialization begins at the post-graduate level, but the foundation course is equally important.
Your choice of the University and study country would and should depend upon the specialization you choose at the Graduate level and at the masters level.
Secondly the choice also depends upon where you wish to continue the practice or rather wish to be employed. Since your field is Research oriented, there are different facilities provided in India and Abroad.

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Thierd and the most important is thye finances and the study environment. and culture provided. You need to study and evaluate the in-campus crowd as well as the living habitat and the availability of jobs while you study.

Keeping all this in mind, ity would be good if you could check or rather select one abroad country and do a thorough study or else consult an Abroad education consultant. But prior tot hat get your research done in terms of which specialization you wish to opt for, your campus life and finances available.
As far as colleges or rather University at Gujarat is concerned, I will list down a few, but do check the University at the earliest before you settle down for one of them.

• Department of Biotechnology, Hemchandracharya North Gujarat University- www.ngu.ac.in
• M.G Science Institue,Ahmedabad- www.mgscience.ac.in
• Gujarat Vidyapeeth, www.gujaratvidyapith.org
• Christ College,Rajkot- www.christcollegerajkot.edu.in/

Hope this helps you in your choice.

Wish you good luck..........