photosynthetic pigments

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Last updated 7:33 AM on 6/11/26
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11 Terms

1
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what are photosynthetic pigments?

molecules that absorb light energy for photosynthesis

2
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where are photosynthetic pigments found?

in thylakoid membranes

3
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how are photosynthetic pigments arranged?

in structures called photosystems

4
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what are the two main photosystems?

  • photosystem I (PSI)

  • photosystem II (PSII)

5
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what wavelength of light does PSI absorb?

700nm

6
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what wavelength of light does PSII absorb?

680nm

7
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what lights do chlorophyll a and b absorb and reflect?

  • absorb red

  • reflect green

8
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what lights do xanthophyll and carotene absorb and reflect?

  • absorb blue

  • reflect orange/yellow

9
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what pigment group are xanthophyll and carotene in?

carotenoids

10
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suggest and explain the advantage of having different coloured pigment in leaves (2)

  • different pigments absorb different wavelengths of light

  • for photosynthesis

11
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what is an advantage to a plant which lives underwater of having accessory pigments? (2)

  • more wavelengths of light can be absorbed

  • so more photosynthesis can occur at low light intensities