The Action Spectrum of Photosynthesis Shows a High Light Absorption

question 5

Multiple Choice

The action spectrum of photosynthesis shows a high light absorption for violet/blue and orange/red and a low absorption for green/yellow.If we were to set up an experiment where narrow bands of unicolored light were shown on an aquatic plant such as Elodea,and we counted the number of bubbles of oxygen produced as an indicator of photosynthetic rate,how would the graph appear?

• A)just like the action spectrum with peaks at violet/blue and orange/red and a trough at yellow/green
• B)exactly inverted from the action spectrum with a peak for yellow/green
• C)perfectly flat because many wavelengths are used by chlorophyll
• D)a descending line because ultraviolet light has more energy than infrared
• E)There is no way to guess without actually running the experiment.

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