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| Pregunta | Respuesta |
| Autotroph | An organism that makes complex organic molecules from inorganic molecules using energy |
| Photoautotroph | Makes its own food using light energy and inorganic materials (CO2, H2O and minerals) by the process of photosynthesis. |
| Heterotroph | An organism that cannot make organic compounds from inorganic sources. It needs a ready made supply of organic compounds. |
| Omnivore | Consumes both plants and animals for food. |
| Photosynthesis | Process whereby light energy from the Sun is transformed into chemical energy, and used to synthesis larger (complex) organic molecules from inorganic substances. |
| Photosynthetic pigments | Light absorbing pigments in chloroplasts. |
| Photosystems | Light harvesting clusters of photosynthetic pigments. |
| Primary pigments | 2 forms of chlorophyll a - with slightly different absorption peaks (680nm and 700 nm) |
| Accessory pigments | Other forms of chlorophyll a, chlorophyll b, carotenoids and xanthophyll's. |
| Stroma | Fluid part of the chloroplast which contains the enzymes controlling the carbon fixation reactions. |
| Photophosphorylation | The phosphorylation of ADP to form ATP using the energy of sunlight. |
| Absorption Spectrum | Graph that shows which wavelengths of light are absorbed by a pigment. |
| Action spectrum | Graph which shows the wavelengths of light that are actually used in photosynthesis. |
| ATP synthase | An enzyme that catalyses the synthesis of ATP. |
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