Through the process of cellular respiration, the energy in food is changed into energy that can be used by the body's cells. Initially, the sugars in the food you eat are digested into the simple sugar glucose, a . The varying glucose concentration affects the rate of cellular respiration as all living cells require both glucose and oxygen for their proper functioning. If the cell has a low level of glucose, then it cannot produce the energy -ATP molecules.
monosaccharide means any of the class of sugars (e.g., glucose) that cannot be hydrolyzed to give a simpler sugar.