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Published byAubrey Keal Modified over 10 years ago
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November 13, 2012 Write out the overall reaction of photosynthesis
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Announcements
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Review of Photosynthesis
At your tables pull out your notes and come up with answers to these questions. What is Photosynthesis? Where does the mass of a plant come from as it grows? What are the reactants of Photosynthesis (what goes in)? What are the products (what comes out)?
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How does photosynthesis really work?
Plants capture sunlight using light absorbing molecules called pigments. Chlorophyll: is found in chloroplast, is the principal pigment for capturing sunlight.
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Chlorophyll There are two types of chlorophyll (A and B) and each captures different wave lengths of UV light.
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Photosynthesis can be broken up into three steps
Light dependent reactions Electron Transport Chain Light independent reactions (Calvin Cycle)
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The anatomy of a Chloroplasts
Thylakoids are saclike membranes which contain the chlorophyll. These are arranged in stacks called grana. This is where the light-dependent reactions occur.
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Chloroplast anatomy The stroma is the region outside the thylakoid membranes. This is where the light-independent reactions take place.
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Light-Dependent Reactions
Light-dependent reactions require light to function, and produce three major products. Oxygen ATP NADPH
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Products of the Light-dependent reactions
These products are used to conduct the processes in the light-independent reactions. Light-dependent
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ATP ATP is a unit of cellular energy responsible for transferring energy within the cell for metabolism
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NADPH This is an electron carrier used to transfer energy.
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Electron Transport Chain
Electron transport chains are the cellular mechanisms used for taking energy from sunlight. This requires electron Carriers like NADPH
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Light-independent Reactions
Light-independent reactions take place in the stroma, outside of the thylakoid membrane The Calvin Cycle uses ATP NADPH from the previous reactions to produce high-energy sugars.
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Calvin Cycle Begins with six CO2 molecules and ATP to create a six carbon sugar (C6H12O6). Calvin Cycle
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