Photosynthesis Puzzle

2. in the thylakoid membranes of chloroplasts, a cluster of chlorophyll and other pigment molecules that harvest light energy for the light reactions of photosynthesis
5. reactions the initial reactions in photosynthesis, which are triggered by the absorption of light by photosystems I and II and include the passage of electrons along the electron transport chains, the production of NADPH and oxygen gas, and the synthesis of ATP through chemiosmosis
6. cycle a biochemical pathway of photosynthesis in which carbon dioxide is converted into glucose using ATP
8. a stack of thylakoids in a chloroplast
9. the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to produce carbohydrates and oxygen
11. a membrane system found within chloroplasts that contain the components for photosynthesis
12. pathway one alternative pathway enables certain plants to fix Co2 into four-carbon compounds
14. an organelle found in plant and algae cells where photosynthesis occurs
16. a class of pigments that are present mostly in plants and that aid in photosynthesis
17. one of many openings in a leaf or a stem of a plant that enables the gas exchange to occur (plural, stomata)
18. in plants, the solution that surrounds the thylakoids in a chloroplast

1. an organism that obtains organic food molecules by eating other organisms or their byproducts and that cannot synthesize organic compounds from inorganic materials
3. electron acceptor in chloroplasts, an acceptor of electrons lost from chlorophyll a; found in the thylakoid membrane
4. a substance that gives another substance or a mixture of its color
7. -a green pigment that is present in most plant and algae cells and some bacteria, that gives plants their characteristic green color, and that absorbs light to provide energy for photosynthesis
10. 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 upon one side of the membrane
13. An organism that produces its own nutrients from inorganic substances or from the environment instead of consuming other organisms
14. fixation the synthesis of organic compounds from carbon dioxide, such as in photosynthesis
15. in chloroplasts and mitochondria, a process in which the movement of protons down their concentration gradient across a membrane is coupled to the synthesis of ATP
16. pathway a water-conserving, carbon-fixing process; CAM plants take in carbon at night and fix it into various organic compounds and release it during the day