* Chemical Structure: Glucose is a simple sugar, meaning it's a single molecule with a basic structure. Cellulose is a complex carbohydrate, a long chain of glucose molecules linked together.

* Energy Storage: The energy in carbohydrates comes from the chemical bonds between the atoms. When these bonds are broken, energy is released.

* Bond Efficiency: The bonds in glucose are more efficient at storing energy than the bonds in cellulose. This is because the bonds in cellulose are primarily involved in holding the long chain together, rather than storing energy.

So, why does cellulose seem like it stores more energy?

It's not about individual molecules. Cellulose is a structural component in plants, forming strong fibers that provide support. While it does store some energy, its primary function is structural. This means that a large amount of cellulose is present in plants, making it appear as though it stores more energy than glucose.

In summary:

* Glucose stores more energy per unit mass than cellulose.

* Cellulose is a structural component and stores energy as a secondary function.

* The large amount of cellulose in plants makes it appear like it stores more energy, but it's a matter of quantity, not individual molecule efficiency.