Hello aspirant,

NO, Biotechnology student are not eligible for DRDO exam . The eligibility criteria for DRDO exam is atleast 1st class Bachelor's degree in Engineering and technology in Electronics & communication engineering/ Mechanical engineering/ Chemical engineering / Electrical engineering from a recognize University.

The Full Eligibility criteria for DRDO is as follows :

Candidates must have a Bachelor's Degree in Science or a three-year diploma in Engineering/Technology/Computer Science/allied subjects in the required discipline from a recognized institute . Candidates in their final year of a degree in any field are now able to qualify for DRDO 2020.

further, to know more about DRDO, and about it's complete details you can follow the below mentioned link to know more about it : https://engineering.careers360.com/articles/drdo-recruitment-through-gate

https://www.careers360.com/keywords/defence-research-development-organisation-company

I hope that this will help.