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Vocab 6.1
Terms for chapter 6 section 1
| Question | Answer |
|---|---|
| autotroph | an organism that produces its own nutrients from inorganic substances or from the environment insteading of consuming other organisms |
| photosynthesis | the process by which plants, algae, and some bacteria use sunlight, carbon doixide, and water to produce carbohydrates and oxygen |
| heterotroph | an organism that obtains organic food molecules by eating other organisms or their byproducts and that cannot synthesize organic compounds from inorganic materials |
| light reactions | intitial photosynthesis reactions, triggered by the absorption of light by photosystems I and II and include the passage of electrons along the elctron transport chains, the production of NADPH and oxygen gas, and the synthesis of ATP through chemiosmosis |
| chloroplasts | an organelle found in plant and algae cells where photosynthesis occurs |
| thylakoid | a membrane system found within chloroplasts that contains the components for photosynthesis |
| granum | a stack of thylakoids in a chloroplast |
| stroma | in plants, the solution that surrounds the thylakoids in a chloroplast |
| pigment | a substance that gives another substnace or a mixture its color |
| chlorophyll | a green pigment that is present in most plant cells, that gives plants their characteristic green color, and that reacts with sunlight, carbon dioxide, and water to form carbohydrates |
| carotenoid | a class of pigments that are present in the thylakoid membrane of plants and that aid in photosynthesis |
| photosystem | in the thylakoid membranes of chloroplasts, a cluster of chlorophyll and other pigment molecules taht harvest light energy for the light reactions of photosynthesis |
| primary electron acceptor | in chloroplasts, an acceptor of electrons lost from chlorophyll a; found in the thylakoid membrane |
| electron transport chain | a series of molecules, found in the inner membranes of mitochondria and chloroplasts, through which electrons pass in a process that causes protons to build up on one side of the membrane |
Created by:
SheaM16
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