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November 13, 2012 O Write out the overall reaction of photosynthesis.

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Presentation on theme: "November 13, 2012 O Write out the overall reaction of photosynthesis."— Presentation transcript:

1 November 13, 2012 O Write out the overall reaction of photosynthesis

2 Announcements

3 Review of Photosynthesis O At your tables pull out your notes and come up with answers to these questions. O What is Photosynthesis? O Where does the mass of a plant come from as it grows? O What are the reactants of Photosynthesis (what goes in)? What are the products (what comes out)?

4 How does photosynthesis really work? O Plants capture sunlight using light absorbing molecules called pigments. O Chlorophyll: is found in chloroplast, is the principal pigment for capturing sunlight.

5 Chlorophyll O There are two types of chlorophyll (A and B) and each captures different wave lengths of UV light.

6 Photosynthesis can be broken up into three steps 1. Light dependent reactions 2. Electron Transport Chain 3. Light independent reactions (Calvin Cycle)

7 The anatomy of a Chloroplasts O Thylakoids are saclike membranes which contain the chlorophyll. These are arranged in stacks called grana. O This is where the light-dependent reactions occur.

8 Chloroplast anatomy O The stroma is the region outside the thylakoid membranes. This is where the light-independent reactions take place.

9 Light-Dependent Reactions O Light-dependent reactions require light to function, and produce three major products. O Oxygen O ATP O NADPH

10 Products of the Light- dependent reactions O These products are used to conduct the processes in the light-independent reactions. Light-dependent

11 ATP O ATP is a unit of cellular energy responsible for transferring energy within the cell for metabolism

12 NADPH O This is an electron carrier used to transfer energy.

13 Electron Transport Chain O Electron transport chains are the cellular mechanisms used for taking energy from sunlight. O This requires electron Carriers like NADPH

14 Light-independent Reactions O Light-independent reactions take place in the stroma, outside of the thylakoid membrane O The Calvin Cycle uses ATP NADPH from the previous reactions to produce high-energy sugars.

15 Calvin Cycle O Begins with six CO 2 molecules and ATP to create a six carbon sugar (C 6 H 12 O 6 ). Calvin Cycle


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