If you were writing a resume after changing careers, how would you choose which format to use?

I will be graduating in May and one of my classes requires a written resume. My previous jobs include restaurant management, hospital unit clerk, telemetry monitor on the cardiac ward, and HR manager. My future career will be as a physician, however the job I am to focus on for the assignment would be related to a bachelor's degree in biochemistry.

Would it be better to focus on specific abilities from these jobs or to continue with a chronological format. Also, should I focus on the classes I have taken to prepare for my degree such as labs and neglect job history or should I include job history and just do a basic overview of my college preparation. Is it necessary to include grade point and test scores (MCAT)? Thanks for any advice you could pass on to me.If you were writing a resume after changing careers, how would you choose which format to use?
I can bring my resume over for you to see. You should include all of the above in different locations on the resume. There should be a place for all relevant background, and some that isnt relevant. You never know what the employer is looking for. I'll bring a copy of mine over that you can keep and look over as a reference. I also have a lot of books on resume writing I can dig out.