1B.3 ATP

• where does the energy needed to make ATP come from?

  the breakdown of a glucose molecule in the process of respiration.
• what can the phosphate product of ATP hydrolysis do?

  can be added to other compounds to make them more reactive (phosphorylation) .
• what does ATP stand for?

  adenosine triphosphate.
• what enzyme catalyses ATP hydrolysis?

  ATP hydrolase.
• what is a coupled reaction?

  when ATP hydrolysis is done simultaneously with other energy requiring reactions, meaning the energy is used directly.
• how is ATP resynthesised?

  The condensation reaction of ADP and Pi.
• what enzyme catalyses the resythesis of ATP?

  ATP synthase.
• when is ATP resythesised?

  during photosynthesis and respiration.
• what components make up ATP?

  3 phosphate groups, ribose, and adenine.
• what is the formula for ATP hydrolysis?

  ATP + H2O = Pi (+energy).
• what happens to ATP when energy is needed by a cell?

  ATP is broken into ADP + P in a hydrolysis reaction.
• where is energy stored in ATP?

  in the bonds between the phosphate groups.
• Why is ATP needed?

  energy cannot be directly released from glucose
• Why do we synthesise so much ATP in a day?

  ATP only releases a small amount of energy at a time

  ATP cannot be stored as it is an immediate source of energy
• how can ATP be resythesised?

  condensation reaction between ADP and Pi which occurs during respiration and photosynthesis. this is catalysed by ATP synthase