Hello,
In order to apply for an admission in a college with Biotech you must have 50% or above in the science subject and overall result of Class 12. To get a good college your score should be above 80%. Many colleges require you to pass the entrance exam after which they coalesce the marks from your entrance test result and your H.S. marks to give you a rank based on which they consider you for admission in Btech First year.