Explore: Drag each molecule from the MOLECULES pane to the RESPIRATION pane.
Observe: Click Next. Observe what happens in the cytoplasm (the stuff surrounding the mitochondria).
This process is called glycolysis. Two pyruvate (C3H3O3–) molecules are produced in glycolysis. The released energy is used to form a net of two ATP (adenosine triphosphate) molecules. Energy is later released when ATP molecules are broken down.
Observe: Click Next. What happens now?