Dear aspirant, as per previous year cut offs the minimum score that fetched top government Medical College under STATE QUOTA in ST category was 351. So, any score above than this can fetch you govt medical college.

If you are looking Medical colleges under AIQ then your score should be above 425 for the best colleges.

Coming to your next question. Individual subjects marks are only considered if there is a clash of marks between 2 students. So, student with more marks in Biology is given preference.

You can check this link for detailed cut off od colleges in Odisha

All the best

Hope this helps