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Photosynthesis

Photosynthesis. 1. Light reaction Recap 2. Calvin Cycle (dark reaction). Talk to a Neighbor…. Using the following diagram, walk your partner through the 5 steps of the light-dependent reactions. What are the reactants of the light dependent reactions?. Sunlight, water, chlorophyll.

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Photosynthesis

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  1. Photosynthesis 1. Light reaction Recap 2. Calvin Cycle (dark reaction)

  2. Talk to a Neighbor… • Using the following diagram, walk your partner through the 5 steps of the light-dependent reactions

  3. What are the reactants of the light dependent reactions? Sunlight, water, chlorophyll What are the products of the light dependent reactions? Oxygen, ATP, NADPH

  4. Part 2: Calvin Cycle • aka Light-Independent reaction or Dark reaction • Does NOT need light because energy from sun already captured in NADPH & ATP • Occurs in stroma

  5. Energy taken from NADPH & ATP & combined w/CO2 & H+ form C6H12O6

  6. NADP & ADP recycled back to light reaction Glucose can be converted by cells into lipids, proteins, nucleic acids, etc.

  7. Calvin Cycle Video

  8. Factors that affect the rate of photosynthesis? • Amount of water & CO2 (reactants) • Temperature - too high or low denatures enzymes • Intensity of light

  9. Putting it Together…

  10. Reactants Products

  11. Review light rxn

  12. Reactants • Diagram Word Bank H2O Glucose Light -Dependent Chloroplast Thylakoids Grana Calvin Cycle Light O2 Stroma Reactants Products H2O CO2 Light NADP+ ADP + P Light Dependent Reaction Calvin Cycle ATP NADPH Chloroplast C6H12O6 Glucose O2 Products

  13. Summary: • Light Dependent Reaction—H2O is broken down and light energy is stored temporarily in energy carriers, ATP and NADPH • Calvin Cycle—energy is transferred from ATP and NADPH to the organic compound glucose

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