LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Photosynthetic pigments have the same optimum temperature as the enzymes used in photosynthesis.
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Plants absorb the same photosynthetic pigments for use in photosynthesis.
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Only wavelengths of light absorbed by pigments can be used in photosynthesis.
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The amount of energy absorbed by photosynthetic pigments is equal to the activation energy for photosynthesis.
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Detailed explanation-1: -Why is the action spectrum for photosynthesis similar to the absorption spectra of photosynthetic pigments? Only wavelengths of light absorbed by pigments can be used in photosynthesis.
Detailed explanation-2: -The graphs are peaking at more than a 400nm wavelength, which is equivalent to blue colour. After that, both graphs show trough. Then they peak again 600 nm between 700 nm and which is equivalent to red colour. So, this shows that action and absorption spectra overlap.
Detailed explanation-3: -The similarity of the action spectrum of photosynthesis and the absorption spectrum of chlorophyll tells us that chlorophylls are the most important pigments in the process. The spectra are not identical, though, because carotenoids, which absorb strongly in the blue, play a role as well.