3.2 Photosynthesis Flashcards

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1
Q

Chloroplasts

A
  • Light trapping organelles found in the cells of the leaf and stem
  • Most chloroplasts found in the palisade mesophyll cells
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2
Q

How are Chloroplasts transducers?

A

They convert the light energy of photons into chemical energy as ATP

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3
Q

Photosynthetic pigments

A

Absorb photons at different wavelengths of light and begin its conversion to storable chemical energy:

  • Chlorophylls
  • Carotenoids
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4
Q

Chlorophylls

A
  • Chlorophyll a
  • Chlorophyll b

They absorb photons of light in the BLUE-VIOLET and RED regions of the light spectrum

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5
Q

Carotenoids (Accessory pigments)

A
  • β-carotene
  • Xanthophyll

They absorb light in the BLUE-VIOLET region of the spectrum

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6
Q

Photosystems

A
  • Antenna complex (cluster of photosynthetic pigments)
  • Reaction centre (Two Chlorophyll a molecules and an electron acceptor molecule)
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7
Q

Photosystem I

A
  • 2 chlorophyll a molecules at its reaction centre with an absorption peak of 700nm
  • Reaction centre of PS I is called P700
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8
Q

Photosystem II

A
  • 2 chlorophyll a molecules at its reaction centre with an absorption peak of 680nm
  • Reaction centre of PS II is called P680
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9
Q

LDS of Photosynthesis

A

Photophosphorylation: The synthesis of ATP using energy from photons of light

Photolysis: The splitting of water to form (2H+) + (2e-) + 1/2(O2)

The reduction of NADP: NADP is reduced to form reduced NADP

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10
Q

Photophosphorylation

A

The addition of an inorganic phosphate ion to ADP to form ATP

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