Hello Komal
Glad to hear that you are willing to join in government services. There are so many options for doing research in biotechnology.

• You will become Research Scientist in various CSIR, ICAR organisation.
• There are many public service undertaking for biotechnology for the following

I) Bharat Immunological & Biological Corporation.
II) The Indian Vaccine Corporation Ltd (IVCOL)
III) The Biotechnology Industry Research Council (BIRAC).
IV) The Bhabha Atomic Research Centre (BARC)

You need GATE Biotechnology for this recruitment.

• Teaching profession in govt. colleges/universities by pursing PHD or getting NET certificate

Hope this helps you
Good luck :)