hi,

see cutoff score changes every year and it depends on certain factors like number of applicants, questions difficulty level, seat matrix, students category, choice of stream and so on. however at per last year closing rank, biotechnology closing rank for manipal campus was 33875. compare to other stream of engineering, biotechnology cutoff rank goes higher. so you might have moderate chances for biotechnology.

I would suggest you also apply for others colleges or entrance test as well. It is always best to apply for multiple colleges.