| Term | Definition |
|---|
| autotroph | Organism such as plants which make their own food. |
| heterotroph | Organism that obtains energy from the food its consumes. |
| adenosine triphosphate | one of the principal chemical compounds that living things use to store and realease 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. |
| pigment | light-absorbing moleccule. |
| chlorophyll | principal pigment of plants and other photosynthetic organisms;captures light energy. |
| thylakoid | saclike photosynthetic membrane found in chloroplats. |
| photosystem | light-collecting units of the chloroplast. |
| stroma | region outside the thylakiod membranes in chloroplats. |
| NADP+ | one of the carrier molecules that transfers high-energy electrons from chlorophyll to other molecule. |
| light-dependent reactions | reactions of photosynthesis that use energy from light to produce ATP and NADPH. |
| ATP synthase | large protein that uses energy from H+ ions to bind ADP and phosphate group together to produce ATP. |
| Calvin cycle | reactions of photosynthesis in which energy from ATP and NADPH is used to bulid high-energy compounds such as sugars. |
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