Hello

First of all, you will have to have biology in your 11th and 12th if you want to do anything in the field of biomedical research. After that you need to score minimum 50% to be eligible for major entrances throughout the country.

There are many entrance exams which you can give like DUET (or you can get admission in top colleges of DU through merit base), BHUET, CUCET. You can even apply for admission in IISC (for details click here https://www.iisc.ac.in/admissions/faq/#:~:text=The%20candidate%20must%20have%20studied,)%20or%20(Advance)%2F%20NEET. )

After Bsc you have to opt for MSc (you can joing any good istitute by giving these entrances-

IIT JAM

DUPGET

BHUPET

CUCET

JNUCEEB

TIFR

GATE

and other entrances specific to particular institutes like entrance test for Hyderabad University). After MSc you have to apply for CSIR JRF or GATE or ICAR JRF based on which you will get a JRF (if you score enough) or even on qualifying you will be eligible for lecturership and after that you can do PhD and get in the research world with the tag of a doctor. It will take you a minimum of 8 years and maximum it can take up to 11 or 12 years.