Bachelor of science is a three years  course and is divided into four semester.For admission in BSc you should be 12th pass from science with botany/biology/physics course in 12th standard.You would need atleast 50% marks in 12th boards exam.The best Bsc in food science colleges in India are as follows-

1)MOB Vaishnav College

2)NNS Hindu college

3)Holy cross home science college

4)Govt. Science and commerce college

5)K.R.G college

6) Institute of home science

7)College of rural science

some of the entrance exam conducted by university are JEEP,CFTRI,IICPT AND GATE