I introduce this lesson by telling students that the class will be playing the roles of the molecules involved in the process of protein synthesis. Before we can play the roles, we need to familiarize ourselves with the story and the characters of the story.
Here we talk about the characters by using this handout (example key follows):
THE STORY OF PROTEIN SYNTHESIS
Next, we begin to visualize the characters in the story of protein synthesis by drawing cartoon pictures of them on a storyboard hand-out that can be obtained from this American Film Institute web site:
Here are some examples of storyboards for the process of protein synthesis: