4.4.2.3 Metabolism — AQA Combined Science Trilogy 8464

Define metabolism as the sum of all chemical reactions occurring within a cell or an organism.
Explain the role of cellular respiration in transferring energy for continuous, enzyme-controlled metabolic processes that synthesise new molecules.
Describe the synthesis and breakdown of carbohydrates, lipids, and proteins using sugars, amino acids, fatty acids, and glycerol.
Outline key metabolic processes, including the conversion of glucose to starch, glycogen, and cellulose.
Describe the formation of lipid molecules from glycerol and three fatty acid molecules.
Explain the use of glucose and nitrate ions to form amino acids, which are subsequently synthesised into proteins.
Describe the metabolic breakdown of excess proteins to form urea for excretion.

Define metabolism as the sum of all chemical reactions occurring within a cell or an organism.
Explain the role of cellular respiration in transferring energy for continuous, enzyme-controlled metabolic processes that synthesise new molecules.
Describe the synthesis and breakdown of carbohydrates, lipids, and proteins using sugars, amino acids, fatty acids, and glycerol.
Outline key metabolic processes, including the conversion of glucose to starch, glycogen, and cellulose.
Describe the formation of lipid molecules from glycerol and three fatty acid molecules.
Explain the use of glucose and nitrate ions to form amino acids, which are subsequently synthesised into proteins.
Describe the metabolic breakdown of excess proteins to form urea for excretion.

Metabolism