Hello Francis

Yes you may apply for medical course  if you get 200 marks only in biology.

But whether you won't get a seat in your desired university or a desired course is difficult to say

200 marks are too less for mbbs , bds, bhms or bams .

You have not mentioned to which category you belong ?

Cut off are less for sc/ ST and obc candidate's.

For general category .

Cut off changes every year and it depends upon number of students appearing in exam, difficulty level of exam, availability of seats, Method of normalisation etc.

For more information you may visit the link given below

https://medicine.careers360.com/articles/neet-qualifying-marks