Dear aspirant please specify complete details in your question like which is your state, category etc.The cutoff for UG courses of Bsc is different for each state and colleges.So,that all depends on which college and state you want.Also the cut off is of 12 th percentage,so that is like i can say that generally in some state for good govt. Colleges the cut off are 75% in boards.But,this is a general conception.It is different for each state and college.
Hope I am clear to you.