Dear Student ,

MS Biology is a masters degree course and as you have told that you're a student from pure science , so to do UG course in Biology , you must need biology subject in your 12th as only after doing UG course in Biology or related discipline , you are eligible to do MS in Biology .

Andhra University College of Science and Technology, Visakhapatnam in India offers  MS in Molecular Biology .

You must secure min 55% in Graduation.

For more details about Biology courses , you may refer this :

https://www.careers360.com/courses/biology-course

Hope this helps !