• explain why ATP is often referred to as the “energy currency” of the cell
  • recall that a single molecule of adenosine triphosphate (ATP) is a nucleotide derivative and is formed from a molecule of ribose, a molecule of adenine and three phosphate groups
  • recall that ATP is synthesised by the condensation of ADP and Pi
  • recall that the synthesis of ATP is catalysed by the enzyme ATP synthase during photosynthesis, or during respiration
  • recall that the hydrolysis of ATP to adenosine diphosphate (ADP) and an inorganic phosphate group (Pi) is catalysed by the enzyme ATP hydrolase (to include that hydrolysis of ATP can be coupled to energy-requiring reactions within cells, and that the inorganic phosphate released during the hydrolysis of ATP can be used to phosphorylate other compounds, often making them more reactive)