What is the most common food substance from which cells obtain energy?
Living organisms obtain energy from carbohydrates and fats. Animal and plant cells differ by means of harnessing energy, but they utilize it in similar ways. Animal cells perform cellular respiration in the mitochondria to obtain energy from glucose (sugar/carbohydrate). Plant cells undergo photosynthesis within an organelle called Chloroplast to convert sunlight into glucose. Plants break the glucose down into energy in their mitochondrion just as animal cells do.
One of the ways that plant and animal cells differ in how they obtain energy is the chloroplasts in plants. Plants take visible light, mostly red and blue, however they do take some green light waves, in through their chloroplasts, and do photosynthesis with the energy that they have attained from the sunlight. Plants are autotrophes; meaning they obtain their energy from abiotic sources, such as sunlight or inorganic chemicals. Animals are heterotrophs; meaning they…