Hii Suraj!

There nothing you can't do. Nothing is impossible. With 70 days in your hand, you can definitely qualify GATE Biotechnology if you are really dedicated. Let me tell you some tips.

* Start with knowing your syllabus precisely. And make a  strict routine ,which you ought to follow.

* Start with looking at the questions of the topic which you are going to study, and then read on the topic so that you focus on attention on those questions.

* Solve as many questions and previous year question banks as you can.

* Do smartwork besides hardwork.

* Clear your doubts on the spot and do not gather them for later.

This will help you to succeed. Hope this helps.

Good luck!