Cis & Trans

Locked by a double bond

An interactive lesson with 6 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Rigid C=C plus two different groups on each carbon → cis/trans (E/Z) isomers.
• Shape changes properties: oils vs trans fats; retinal’s flip lets you see.

Steps

1. No turning
2. Which can be cis or trans?
3. Fats
4. Seeing is a cis–trans switch
5. The fastest switch in your body
6. E and Z