University of Arizona
The Biology Project: Energy, Enzymes, and Catalysis Problem Set
How well do you know the relationship between enzymes and activation energy? This resource provides you with short quizzes and tutorials to provide feedback for those topics you don't understand.
Khan Academy
Khan Academy: Biology: Energy and Enzymes: Atp and Reaction Coupling
Investigate ATP structure, ATP hydrolysis to ADP, and reaction coupling in this article.
BioMan Biology
Bio Man Biology: Life Chemistry Quizzes
Two multiple-choice quizzes, one on the processes and types of biological molecules, the other on the structure and replication of DNA.