| A | B |
|---|
| biochemical pathway | series of reactions in which the product of one reaction becomes the reactant of the next |
| autotroph | organism that can make their own food |
| heterotroph | organism that cannot make their own food but must depend on autotrophs for nutrition |
| cellular respiration | process that releases chemical energy for use by the cell |
| chlorophyll | main photosynthetic pigment |
| sunlight | main source of energy |
| pigments | colored compounds that absorb light |
| guard cells | control the opening and closing of the stomata |
| stomata | opening through which oxygen leaves the leaf and carbon dioxide enters |
| thylakoid | individual flattened sac of the chloroplast |
| grana | stack of thylakoids |
| stroma | liquid material of the chloroplast |
| Products of the light reaction | oxygen, ATP, NADPH |
| photosystem | group of pigment molecules that absorb light with chlorophyll a at the center |
| NADP+ | electron and proton carrier for photosynthesis |
| ATP | Adenosine triphosphate |
| Calvin Cycle | dark reaction |
