Dear aspirant,
It's completely you decision what you will take.
But as you are class 10 students you need to take science in you 10+2 boards as you want to be either doctor or Biotechnologist.
So you have enough time to think about it .
Start studying science  thoroughly and you will get to know more about it and then take the decision ,now it's to early for you to decide .

But asin India we don't have much better option for Biotechnologist though soon it will be in high demand ,but till now mbbs or md is one of the most paid profession in India .