1. Identify three key components of mitochondria that are essential for the production of ATP and state why they are important.

2. Describe the role/function in photosynthesis of each of the following and where they are located in the cell: (1) NADPH, (2) RUBISCO, (3) thylakoid membranes, (4) grana, (5) stroma, (6) chlorophyll.

3. Certain compounds called uncouplers (eg. dinitrophenol) prevent the synthesis of ATP in mitochondria. They do not interfere with the passage of electrons down the electron transport chain to oxygen, but they can shuttle protons across a membrane. How might these uncouplers prevent ATP synthesis?

4. The Krebs cycle and the Calvin cycle play important roles in cells. Where in the cell do these cycles occur? Can the Krebs cycle and the Calvin cycle occur in the same cell? What are the key molecules that store or provide chemical energy for these cycles?

5. What are the light and dark reactions of photosynthesis and how are they related?