| A | B |
| pigment | light-absorbing substance in plants |
| chlorophyll | green pigment that is present in most plant cells |
| carotenoid | yellow and orange pigment in plant leaves |
| thylakoid | disk-shaped structure wherein cluster of pigments are embedded |
| electron transport chain | series of molecules through which excited electrons are passed along a thylakoid membrane |
| NADPH | electron carrier that provides the high-energy electrons to make carbon-hydrogen bonds in the 3rd stage of photosynthesis |
| carbon dioxide fixation | transfer of carbon dioxide to organic compounds |
| Calvin Cycle | series of enzyme-assisted chemical reactions that produces a three- carbon sugar |
| photosynthesis | process by which plants used sunlight ,, carbon dioxide, and water to produce carbohydrates and oxygen |