Cellular respiration is known to be metabolic process that occurs in the cell of an organism that converts biochemical energy from nutrients into ATP thereby releasing waste products. However, a producer is known to be an organism that creates its own food from inorganic matter by converting water, CO2 and sunlight into carbohydrates and example of producers includes: plants, algae and lichen while consumers are organisms that consume food generated by producers and many insect and animals are consumers.