An action spectrum plots the rate of photosynthesis at various wavelengths of visible light, and it shows that blue light with a wavelength of about 490 nm is effective in driving photosynthesis. Based on this information and the absorption spectra shown at left, what role may chlorophyll b and carotenoids play in photosynthesis?

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An action spectrum plots the rate of photosynthesis at various wavelengths of visible light, and it shows that blue light with a wavelength of about 490 nm is effective in driving photosynthesis. Based on this information and the absorption spectra shown at left, what role may chlorophyll b and carotenoids play in photosynthesis?

 
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If only chlorophyll a were involved in the light reactions, would blue light (wavelength about 490 nm) be effective in driving photosynthesis?

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If only chlorophyll a were involved in the light reactions, would blue light (wavelength about 490 nm) be effective in driving photosynthesis?

 
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You obtain the pigments called carotenoids in your diet when you eat carrots. Why do carotenoids appear yellow and orange?

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You obtain the pigments called carotenoids in your diet when you eat carrots. Why do carotenoids appear yellow and orange?

 
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Approximately what wavelength of light is best absorbed by chlorophyll a, the pigment that participates directly in the light reactions?

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Approximately what wavelength of light is best absorbed by chlorophyll a, the pigment that participates directly in the light reactions?

 
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