The tips begin at a different place in each module. The advice moves along with the stages of the course.
AAMC selected their list of MCAT organic mechanisms from those that are most important to biochemistry. However, the list is not complete, and there is another set of mechanisms which are also very important and which often seem to show up in MCAT passages, such as Claisen condensation and Michael addition. These are not on the list. This can be frustrating. What's really the scope of required knowledge and what's out of scope? The truth is that AAMC isn't as brutal about these other reactions, but foreknowledge is still a figure of merit. There are many out of scope elements in the passages in every subject area. Don't panic. They are punching you in the face to see if you can keep your footing.