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9 Cards in this Set
- Front
- Back
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Photosytonthesis |
Photosynthesis is the production of carbon compounds in cells using light energy |
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Equation for photosynthesis |
water + carbon dioxide --> carbohydrate (glucose) + oxygen 6H2O + 6 CO2 --> C6H12O6+ 6O2 |
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What is the main pigment used in photosynthesis? |
Chlorophyll |
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How well chlorophyll absorbs the following wavelengths of light (red, blue and green) |
Red - 2nd best. Absorbs a lot but less than blue. Blue - Absorbs the most. Green - Green light is mainly reflected, not absorbed well. |
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Step 1 of photosynthesis |
The light dependent stage: 1) Light energy is absorbed by chlorophyll. 2) Photolysis happens, where water is split into H and O2. The H will be used to build glucose from carbon dioxide, and the O2 will be released as a waste product. ( The H is split into a hydrogen ion H+, and an electron e-, which are both used to convert solar energy into chemical energy.) 3) Some energy (ATP molecules) will also be produced in this stage, and will be used in the next stage to attach the H to the CO2. |
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Step 2 of photosynthesis |
The light independent stage: 1) The energy molecule ATP is used to produce carbohydrates and other carbon compounds from CO2. |
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Rate of photosynthesis depending on temperature |
1. The rate of photosynthesis increases because of the increasing molecular collisions due to an increased kinetic energy. 2. Maximum rate of photosynthesis at the optimal temperature. 3. The bonds in the enzyme break and leads to a change in shape of the active site, it denatures. This decreases the rate of photosynthesis. |
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Rate of photosynthesis depending on light intensity |
-When reaching a certain light intensity the oxygen starts to compete with the CO2 for the active site. More oxygen binds to the enzyme, this leads to less sugar made and the rate slows. -More ATP and NADPH are made as light intensity increases. This leads to more oxygen and sugar being produced. |
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Rate of photosynthesis depending on concentration of CO2 |
-Above a certain concentration the rate levels off. -More CO2 increases the photosynthesis rate. |
