Hello Silli,

The closing ranks of IITs may vary every year.According to IIT JAM 2019 the closing ranks of various IITs for biotechnology (General ) is given below :

IIT Bombay - 19

IIT Roorkee - 56

IIT Indore - 71

You could visit the link given below for further clarification,

https://jam.iitk.ac.in/doc/JAM2019_cutoffRound3.pdf

Hope you find this useful!!