Hey Ruman, 

Indian Institute of Technology Kharagpur (IITKGP) offers Integrated M.Sc.-Ph.D.Program in “Chemical and Molecular Biology”. Eligibility for admission to this course in IIT Kharagpur is that you must have passed a Bachelor's degree in any branch of Life science or Chemistry and have scored minimum 55% aggregate marks (50% for SC/ST and PwD category) (taking into account all subjects, including Languages and Subsidiaries, all years combined) 

Good Luck!