Question

which molecule is the reactant of glycolysis?
carbon dioxide
glucose
atp

Explanation:

Glycolysis is the process of breaking down glucose to produce energy. The reactant (starting molecule) of glycolysis is glucose. Carbon dioxide is a product of cellular respiration (including later stages after glycolysis), ATP is a product of glycolysis, and the yellow card's content isn't clear but glucose is known to be the reactant for glycolysis.

Answer:

The molecule that is the reactant of Glycolysis is glucose (the orange card labeled "glucose").