What fuel do plants and animals cells use for energy?

Plants primarily use glucose, which is produced through photosynthesis, as their main fuel for energy. Animal cells, on the other hand, also utilize glucose derived from carbohydrates in their diet, but they can also metabolize fats and proteins for energy. Both plant and animal cells convert these energy sources into ATP (adenosine triphosphate) through cellular respiration. This process is essential for powering cellular functions and maintaining life.