1. What Region of visible light spectrum yields the highestphotosynthetic rates in spinach? What regions yield the lowestphotosynthetic rates? How do you know? (See graph below)
2. 2. Green photosynthetic pigments (e.g., chlorophyll a and b)capture energy from a wide—but not the widest possible—region ofthe visible spectrum of light. What pigment color would enableplants to capture energy from almost the entire spectrum of visiblelight? Why, then, are most plants green? (see graph below)
3. 6. Describe the impact of green light, blue light, and DCMUon photosynthesis. Use data to support your answer.
| Time (min) | Tube 1-Control Dark | Tube 2-DPIP & Dark | Tube 3- DPIP & White Light | Tube 4-DPIP & Green Light | Tube 5-DPIP & Blue Light | Tube 6-DPIP & DCMU |
| 1 | 0 | 0.419 | 0.355 | 0.358 | 0.423 | 0.449 |
| 5 | 0 | 0.427 | 0.171 | 0.284 | 0.375 | 0.446 |
| 9 | 0 | 0.416 | 0.015 | 0.224 | 0.321 | 0.44 |
| 13 | 0 | 0.417 | 0.017 | 0.133 | 0.251 | 0.448 |
| 17 | 0 | 0.43 | 0.005 | 0.105 | 0.231 | 0.447 |
