Question

A genetic alteration which caused both photosystems of the light-dependent reactions to incorporate P700 chlorophyll molecules into their reaction centers would be disastrous for a plant’s photosynthetic ability. [Hint: your answer should include some discussion of redox potential.]

Question 13 4 pts Open-response true/false question A genetic alteration which caused both photosystems of the light-dependent reactions to incorporate P700 chlorophyll molecules into their reaction centers would be disastrous for a plant's photosynthetic ability. (Hint: your answer should include some discussion of redox potential.]

Answer 1

True

Photosystem 1 and photosystem 2 contain many pigments that help collect light energy, as well as a special pair of chlorophyll molecules found at the core (reaction centre) of the photosystem. The special pair of photosystem I is called P700, while the special pair of photosystem II is called P680. P700 has high redox potential and therefore, it acts as a strong reductant. Now when a genetic alteration changes p680 into p700 the system of electron movement will collapse as electrons move from the high redox potential to the low redox potential.