Has your coffee addiction taught you anything about coffee?

Coffee’s caffeine keeps us awake by blocking the binding of which molecule?

A. Adenosine

B. Dopamine

C. Serotonin

D. Cortisol

A. Adenosine. Adenosine is a broken-down version of adenosine triphosphate, a molecule that provides energy to our cells. As it breaks down, more adenosine is left over, which binds to our cells and signals our body to rest. Caffeine blocks this process, keeping us wakeful.