When you eat a plant you derive energy from the stored cellulose?

When you eat a plant, you primarily derive energy from carbohydrates, proteins, and fats, rather than cellulose. While cellulose is a major component of plant cell walls, humans cannot digest it due to the lack of necessary enzymes. Instead, cellulose acts as dietary fiber, aiding digestion and promoting gut health. The energy you gain from plants mainly comes from digestible sugars and starches.