Yes! You can do BEd after completion of your BTech provided you must have 50% marks in aggregate. Now as you are going for BEd then you must know that its more useful for school education. Now if you are really passionate about the same then you should go for the course.

To know more about BEd visit the link below:

https://www.careers360.com/courses/b-ed-bachelor-of-education

To know more about BTech Biotechnology visit the link below:

https://www.careers360.com/courses/b-tech-in-biotechnology

I hope this answer helps. All the very best for your future endeavors!