Hi,

The cut off marks varies highly from one institution to another so it is difficult to provide you with the exact information when you have not mentioned the name of the college.

However, it is better if you score around 85% or above in 12th boards in Science stream if you want a guaranteed seat in any college to pursue B.sc course in Biotechnology or Forensic or Microbiology. For OBC candidates, 85% or more is the usual cut off every year so you may consider this to be the cut off this year too for most of the colleges.

Apply & wait for the counselling process to begin to get a confirmed seat in the college of your choice.

Hope this helps.