MAKING ATP

• HOW IS ATP PRODUCED?

  1. Chlorophyll molecule absorbs light energy
  2. Boosts the energy of a pair of electrons in the molecule
  3. Electron pair raised to higher energy level
  4. Electron pair leave chlorophyll molecule
  5. Chlorophyll molecule becomes ionised
  6. Electron pair taken up by an electron carrier, which is then reduced
  7. Electrons are passed along multiple electron carriers in a series of oxidation-reduction reactions
  8. Each new carrier is at a slightly lower energy level than the previous
  9. Electrons lose energy at each stage
  10. Some energy is used to convert ADP + Pi into ATP
• WHAT IS IT CALLED WHEN AN ELECTRON PAIR MOVE UP AN ENERGY LEVEL?

  'excited state'
• WHAT IS IT CALLED WHEN A CHLOROPHYLL MOLECULE IS IONISED BY LIGHT?

  photoionisation
• WHAT HAPPENS WHEN THE ELECTRONS ARE PASSED ALONG THE CARRIERS IN A SERIES OF OXIDATION-REDUCTION REACTIONS?

  electron carriers form a transfer chain in the thylakoid membrane