Metabolism

• Metabolism is the sum of all the reactions in a cell or the body
• All the reactions of metabolism are controlled by enzymes
• Starch, glycogen and cellulose are all large molecules created by joining lots of glucose molecules
• One molecule of glycerol and three fatty acids are needed to make a lipid molecule
• Glucose and nitrate ions are needed to make amino acids.
• Urea is formed when excess proteins are broken down