One great enzymatic dollop, for the core content and AHL/ SL Option C. Make sure you use this theory in your write-ups, can relate the action of enzymes to their structure as proteins and look for examples of enzymes in action throughout the course.
Essential Biology 3.6 & 7.6/C2: Enzymes
Check out this article on the potential use of an enzyme in second-generation biofuels.
What is an enzyme? from Northland (the best one – including inhibitors, pathways and feedback inhibition)
How enzymes work from McGraw Hill
Enzyme basics from KScience.co.uk
A full collection of savable enzyme animations from Husam Medical
And John Giannini’s Enzyme collection is nice and clear.
Enzyme activity and kinetics
Enzyme kinetics from Wiley Interscience
Protein denaturation from McGraw Hill
Complete tutorial from Wiley Interscience
What is an enzyme? from Northland
Feedback (end product) inhibition from McGraw Hill
And here’s a quick run down on YouTube: