4.4.2.3 metabolism

• What is metabolism?

  The sum of all the reactions in a cell or the body
• what is the energy transferred by respiration in cells used by?

  the organism for the continual enzyme controlled process of metabolism that synthesise new molecules
• what does metabolism include?

  • conversion of glucose to starch, glycogen and cellulose
  • the formation of lipid molecules from a molecule of glycerol and three molecules of fatty acids
  • the use of glucose and nitrate ions to form amino acids which in turn are used to synthesise proteins
  • respiration
  • breakdown of excess proteins to form urea for excretio