This site provides information on carbohydrate metabolism regulation through a quiz set-up. Answer each question, and the correct answers will be presented, complete with a full tutorial.
Understandable lessons about numerous aspects about the composition, function, and interactions of proteins. Each starts with an interactive quiz and links to a tutorial.
Problem sets, tutorials, and activities related to biochemistry.
This site from the University of Arizona describes how blood type is passed on from parent to child. The tutorial covers the genetics of the ABO blood groups as well as Rh factor. There are even practice problems and blood type calculators!
Has explanations, illustrations, and a Quick Time movie to download. Also contains practice test questions that are answered online.