Mitochondria are the powerhouses of the cell because they break the chemical bonds of glucose to release energy that our cells use to do work and perform chemical reactions.
All life is composed mainly of the four macromolecule building blocks: carbohydrates, lipids, proteins, and nucleic acids. The interactions of different polymers of these basic molecule types make up the majority of life's structure and function.
No , you get some energy from the fruit but not all.All of the energy comes from the things that you do and consume during the day.