What color of light would be least effective at driving photosynthesis and why?

Question

What color of light would be least effective at driving photosynthesis and why? Explain and support your answer with any necessary data. A starving cell has reached the stage where all of the has been used up. If this cell was placed in a fresh nutrient broth at this point, will the cell recover and survive? Explain! Biologists refer to the movement of energy through an ecosystem as "energy flow" and not "energy cycling". Why do you think they use the word flow instead of cycling? Relate your answer to the laws of thermodynamics. A series of enzymes catalyze the reaction X rightarrow Y rightarrow Z rightarrow. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases activity for the enzyme. Explain this system and what function each substrate, product, and enzymes serves in this system. Use the appropriate terminology.

Explanation / Answer

Green light is least effective for plants because of their green color. They appear green due to their high absorbing power for non--green components of light. Plants rather prefer low energy red light rather than high energy green light.

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