Hello Aryan,

Make sure that you score an aggregate of 75% in PCB. Then you can do B.Sc in any subject that you desire which may be biochemistry, biophysics, microbiology, molecular biology, biotechnology, environmental science, etc. in a reputed institute. For that, you may have to take entrance exams such as IISER BSc Entrance Exam, OUAT BSc Entrance Exam, UPCATET, AGRICET, etc.

After that you need to enroll for M.Sc and for that, you may enroll for any of the following exams, 

1. IIT JAM

2. NEST

3. JEST

4.UPCATET

Then, you have to do a Ph.D. and post-doctorate in your subjects to become a scientist.

Hope this satisfies your query, any feedback or further query is heartily welcomed.

Thank you.