| A | B |
|---|
| reaction center | 2 chlorophyll molecules which donate e- to the primary electron acceptor |
| Photosystem I | P700 and oldest, it accepts electrons from PSII |
| Photosystem II | P680 and starts photosynthesis by donating electrons to PSI, and replacing those electrons from water |
| noncyclic phosphorylation | ATP production from a linear ETC in PSII |
| cyclic phosphorylation | ATP production in PSI that cycles within the PSI |
| Calvin cycle | water + ATP + CO2 + NADPH --> sugar + H2O + ADP + Pi |
| RuBP | 5C compound in Calvin Cycle that is catalyzed by rubisco |
| rubisco | enzyme that fixes carbon in the Calvin cycle |
| G3P | 3C sugar that exits the Calvin cycle to form starch |
| photorespiration | a metabolic process where photosynthesis stops due to rubisco fixing O2 instead of CO2 in warm temperatures |
| C3 plants | plants with the standard photosynthetic pathways |
| C4 plants | plants that fix carbon into a 4C compound to avoid photorespiration in tropical climates |
| CAM plants | adaptation to hot dry climates where plants "bank" CO2 at night |
| bundle sheath cells | in C4 plants these hold CO2 as oxaloacetate (4C) to reduce photorespiration |
| PEP --> oxaloacetate | reaction in C4 plants that trap CO2 |
| PEP carboxylase | enzyme that catalyzes PEP to oxaloacetate in C4 plants |
| water | ultimate source of electrons for replacing those lost from chlorophyll in light reactions |
