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Photosynthesis Summary
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1. Fill out the equation for photosynthesis (you may use chemical symbols or words)
a. Label the reactants and the products
b. Label the organic compound(s) and the chemical energy
6CO2 + 6H2O + light energy ( 6O2 + C6H12O6
a. Reactants: carbon dioxide, water, light energy / Products: oxygen and glucose
b. Organic compounds: ONLY GLUCOSE!!
2. Photosynthesis takes place in the chloroplast inside of the leaves.
3. During photosynthesis, what energy is necessary to split water? Solar energy When water is split, oxygen is released.
4. During the Calvin Cycle of photosynthesis, stored energy is used to convert CO2 into PGA , which is converted into PGAL .
5. Explain the role of NADPH and ATP in photosynthesis. NADPH and ATP are used for the reduction of PGA to PGAL. ATP is also utilized during the regeneration of RuBP from PGAL.
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Photosynthesis Break Down!
Most Important Concept to Understand – The Formula – ALWAYS Write it Down!
6CO2 + 6H2O + light energy ( 6O2 + C6H12O6
The Steps
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|Photosynthesis Step |Chemicals |Summary of Step |
|C- light dependent reactions | | |
| |a. sunlight | |
| | |Photolysis will split a molecule of water producing oxygen gas. In light-dependent reactions, the|
| |b. H2O |energy from sunlight is absorbed by chlorophyll and converted into chemical energy in the form of|
| | |electron carrier molecules like ATP and NADPH. Light energy is harnessed in Photosystems I and |
| |d. O2 |II, both of which are present in the thylakoid membranes of chloroplasts. |
| | | |
| |e. ATP | |
| | | |
| |f. NADPH | |
|H- light independent reactions| | |
| | |In the Calvin cycle, carbon atoms from CO2are fixed (incorporated into organic molecules) and |
| |g. CO2 |used to build three-carbon sugars. This process is fueled by, and dependent on, ATP and NADPH |
| | |from the light reactions. Unlike the light reactions, which take place in the thylakoid membrane,|
| | |the reactions of the Calvin cycle take place in the stroma (the inner space of chloroplasts). |
| |i. PGAL (sugar) | |
| | | |
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