Hi Subrat,

Congratulations on bagging BioTechnology branch in Thapar University. Thapar University Conducts an internal exam based on which you can go go for the upgradation. The Exam will commence after the first semester on JEE mains Syllabus and the same pattern, but much easier. Another Method to improve your branch is through you CGPAwhich will play an important part in all your placements and interships. So I would suggest you to keep your CGPA well above 7.5 from your 1st semester onwards., for a smooth commencement of your college life. So after the end of your first year another counselling will take place where you mostly get any branch that you want, just keep up with above mentioned CGPA. 

I hope I was able to clear our doubt,

If you have any other query than just feel free to post it on the portal,

Thank you