Ch 8 Photosynthesis
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16 terms
Terms | Definitions |
|---|---|
 Autotrophs | Organisms that are able to make their own food |
| Heterotrophs | Organisms that depend on other organisms for their food |
| ATP | (adenosine triphosphate) main energy source that cells use for most of their work |
| ADP | adenosine diphosphate; the compound that remains when a phosphate group is removed from ATP, releasing energy |
| Photosynthesis | process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches |
| Carbon Dioxide | a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances |
| Oxygen | A colorless gas that is given off by plants during photosynthesis and used by animals during respiration |
| Chloroplast | organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy |
| Pigments | Light-absorbing molecules |
| Chlorophyll | green pigment in plants that absorbs light energy used to carry out photosynthesis |
| Thylakoids | A flattened membrane sac inside the chloroplast, used to convert light energy to chemical energy (Light Rxn occur here) |
| Photosystems | clusters of chlorophyll within the thylakoid membrane that absorb light energy (LIght Rxn occur here) |
| Stroma | region outside the thylakoid membranes in chloroplasts (Calvin Cycle occurs here) |
| NADP | one of the carrier molecules that transfers high-energy electrons from chlorophyll to other molecules |
| NADPH | electron carrier that provides high-energy electrons for photosynthesis |
| Calvin Cycle | a biochemical pathway of photosynthesis in which carbon dioxide is converted into glucose using ATP (occurs in stroma) |
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