Hello,

Depending on what I know they may be asking on biochemistry energetics, nutrient source, vitamin source, metabolism, logical reasoning and simple calculations. Graduation requires that you have basics in concepts of energetics and logical reasoning. So you can prepare for exam based on these topics. Most of the time the examination conducting authority release the syllabus.

Hey Mahekbanu,
First of all your career preference is good and you need to know that this career is one of the highly paid. Now coming to your question then according to latest paper styles your biology till 12th class should be very great and many MCQs are directly asked from them only. Some basics physics related questions are also asked which are application based so go through a well publication reference book for them. Some logically related questions are also asked so overall you need to have some knowledge of them also. Hope you find it useful.
Thank you.