Made and Used

• is atp made and used quicky?

  yes
• What happens when energy is needed by a cell?

  ATP broken down into ADP and Pi
• What does ADP stand for?

  adenosine diphosphate
• what is Pi?

  Inorganic phosphate
• What sort of the reaction is it when ATP --> ADP+Pi

  Hydrolysis reaction. A phosphate bond is broken and energy is released. reaction catalysed by enzyme ATP HYDROLASE
• What can ATP hydrolysis be coupled with?


  Other energy-requiring reactions in the cell- this means the energy released can be used directly to make the coupled reaction happen, rather than being lost as heat
• What can happen to the released inorganic phosphate (made when ATP -->ADP+Pi)?

  the released Pi can be put to use - can be added to another compound - this is known as phosphorylation - which often makes the compound more reactive
• How is ATP re-synthesised?

  In a condensation reaction between ADP and Pi

  • This happens during both respiration and photosynthesis, and is catalysed by the enzyme ATP synthase
• what is inorganic phosphate just a fancy name for?


  a single phosphate
• what enzyme catalyses the synthesis of ATP?

  ATP synthase
• what enzyme catalyses the hydrolysis of ATP?

  ATP hydrolase