You are expected to know enzyme kinetics, specifically Michaelis-Menten kinetics - check out page 12 of the new AAMC outline.
A good additional resource (outside of whatever books you may have + Khan), I'd suggest checking out this website as it's been pretty helpful:
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/E/EnzymeKinetics.html
Although it doesn't look like the Burke plot is a topic on the content outlines, it is just an off-shoot of MM kinetics, so I'd say it couldn't hurt to know it.