Inside a Chloroplast :
Inside a Chloroplast Thylakoids – saclike photosynthetic membranes
Grana – stacks of Thylakoids.
Photosystems – light-collecting units of the chloroplast
Light Dependent reactions take place here
Inside the Chloroplast :
Inside the Chloroplast Stroma - the region outside the thylakoid membranes - Calvin Cycle occurs here
Light-Dependent Reactions :
Light-Dependent Reactions The light-dependent reactions produce oxygen gas and convert ADP and NADP+ into the energy carriers ATP and NADPH
Slide 8:
Light-Dependent Reactions :
Light-Dependent Reactions The light absorbed by photosystem II is used to break up water molecules into energized electrons, hydrogen ions, and oxygen.
Electron Transport chain – the system that high energy electrons move to get to photosystem I.
Light-Dependent Reactions :
Light-Dependent Reactions Photosystem I – electrons released by photosystem II are energized again in photosystem I. Enzymes in the membrane use the electrons to form NADPH. NADPH is used to make sugar in the Calvin cycle.
Light-Dependent Reactions :
Light-Dependent Reactions Hydrogen Ion Movement - The inside of the thylakoid membrane fills up with hydrogen ions. This action makes the outside of the thylakoid membrane negatively charged and the inside positively charged – this provides the energy to make ATP.
Light-Dependent Reactions :
Light-Dependent Reactions ATP Formation – as hydrogen ions pass through ATP synthase, their energy is used to convert ADP to ATP.