1. The document discusses the light and dark reactions of photosynthesis, including the role of chlorophyll, photosystems, and the Calvin cycle. 2. The light reactions use energy from sunlight to create ATP and NADPH through photosystem I and photosystem II in the thylakoid membrane, while the dark reactions use these products to incorporate carbon dioxide into glucose through the Calvin cycle. 3. The dark reactions cannot occur without ATP and NADPH produced during the light reactions, so while they do not require direct light, they are dependent on the light reactions taking place.

1. General Hmk: CC 8.2 & 8.3 Honors Hmk: CC 7.5, 7.7 – 7.11 Objective: Light and Dark Reactions of Photosynthesis Procedure: 1. PP lecture 2. Begin homework Bell-Work: Explain this cartoon. November 8, 2006

2. PHOTOSYNTHESIS Sugar ATP & NADPH (from light reaction) and CO 2 Stroma Dark reaction (Calvin cycle) ATP & NADPH and O 2 Light energy and H 2 O Thylakoid membrane Light reaction CREATES USES LOCATION STEP

6. The pigment molecules in chlorophyll are arranged in clusters called photosystems

8. Energy photons e - excited e - heat energy

10. There are 2 types of photosystems and 2 parts to the light reactions Photosystem II Photosystem I Energy photons O 2 H 2 O e - excited e - ATP e - TC e - excited e - NADPH photons

12. 1 CO 2 glucose It takes SIX turns of the cycle to make one glucose ATP ATP NADPH ADP ADP NADP + Calvin Cycle

13. Do the dark reactions occur in the complete absence of light? For the dark reaction to occur, NADPH and ATP must be created by the light reactions So although it is called the dark reaction because it needs no direct light energy source, it can’t occur unless the light reactions occur

14. Clear Your Desk of everything but your notes QUIZ

15. 1 2 5 (the reaction) 6 3 4 7 8 9 10 (the reaction) 11