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ch. 4
vocab
| Term | Definition |
|---|---|
| autotroph | organisms that make their own food. They are also called producers |
| cellular respiration | The process in which glucose is broken down and ATP is made. |
| consumer | heterotrophs are called consumers. |
| energy | the ability to work. |
| food | consists of organic molecules that store energy in their chemical bonds. |
| glucose | is a simple carbohydrate that stores energy in a concentrated stable form. |
| heterotroph | living things that cannot make their own food. They get food by consuming other organisms, which is why they are called consumers. |
| photosynthesis | changes light energy into chemical energy and also releases oxygen. |
| producer | autotrophs are called producers. |
| Calvin cycle | stage II of photsynthesis- combines carbon from carbon dioxide in the air and uses the chemical energy in ATP and NADPH to make glucose. |
| chemosynthesis | uses chemical energy instead of light energy. |
| chlorophyll | a green pigment. |
| electron transport chain | a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation. |
| grana | grana consists of sac-like membranes, known as thylakoid membranes. |
| light reactions | stage I of photosynthesis- This stage uses water and changes light energy from the sun into chemical energy stored in ATP and NADPH (another energy-carrying molecule). This stage also releases oxygen as a waste product. |
| photosystem | group of molecules that include chlorophyll |
| stroma | space outside the thylakoid membranes. |
| thylakoid membrane | these membranes contain photosystems. |