Each slide should be self explanatory. Be sure to include a minimum of 50 words in the Presenters Note Page that describes the content of the slide (the title and literature cited slides are omitted from this requirement).
View http://www.garrreynolds.com/preso-tips/design to learn more about good, academic Presentations.
Figures are important. I suggest using Googles Image search to find relevant figures for your presentation. However, be sure to evaluate the quality (both for aesthetics and accuracy) and cite the source of the figure.
Mechanism 2 (2-3 slides)
Method of action for Mechanism 2 (2-3 slides)