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6 Cards in this Set
- Front
- Back
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Photosynthetic Pigments |
Photons are chemicals that absorb light energy, found in the thylakoid membrane ●Each pigment absorbs a specific wavelength of light energy ●Chlorophyll molecules can be: -Chlorophyll A OR B -Carotene -Xanthophyll ●Plants have several photosynthetic pigments so that they can absorb a greater range of wavelengths. |
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Photosynthesis graph |
The action spectrum is the rate of photosynthesis at each wavelength |
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Photosystems (Light Harvesting) |
Photosynthetic pigments are arranged in clusters called photosystems ●PS11- absorbs light best at 680nm ●PS1- absorbs light best at 700nm ●Photosystems consist of primary &accessory pigments Accessory - molecules like carotenoids surround primary pigment & absorb light energy and pass energy on to one another & then to the primary p Primary- molecules like chlorophyll A are reaction centres where electrons get excited to higher energy levels during LDR |
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Redox Reactions |
Involve oxidation and reduction reactions,occur during photosynthesis Oil rig Oxidation is loss Reduction is gain ( of electrons) |
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Co-Enzymes |
Molecules that aid the function of an enzyme ●Usually work by transferring a chemical from 1 molecule to another ●NADP is an important Co enzyme used in photosynthesis ●it transfers hydrogens from 1 molecule to another |
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Overview of Photosynthesis |
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