PCOG LEC - Photosynthesis

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28 Terms

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PHOTOSYNTHESIS

  • "synthesis using light"

  • process in which plants turn inorganic carbon into organic carbon in the form of carbohydrates

  • creating something using light

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CARBON COMPOUNDS
carbohydrates
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INORGANIC CARBON
not bound to hydrogen atoms
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LIGHT DEPENDENT REACTIONS
process: uses light energy --> chemical energy
result: produces ATP and NADPH
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THYLAKOID MEMBRANE

  • it is where light dependent reactions occur

  • pouch like sacks attach to the membrane in chloroplasts

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PHOTONS AND WATER
requirements for light phase
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PHOTON
basic unit of light
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ATP AND NADPH
products of light phase in photosynthesis
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ADENOSINE TRIPHOSPHATE
meaning of ATP
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NICOTINAMIDE ADENINE DINUCLEOTIDE PHOSPHATE
meaning of NADPH
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LIGHT INDEPENDENT REACTIONS
process: involves reduction reaction
result: produces G3P
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STROMA

  • it is where the dark phase occur

  • clear fluid that fills the inside cavity of the chloroplast

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CO2, ATP, and NADPH
requirements for the light dependent reaction
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CALVIN CYCLE
what is another name for light independent reaction
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MELVIN CALVIN
developed the process or key mechanisms of the light independent reaction
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GLYCERALDEHYE-3-PHOSPHATE
meaning of G3P (product of the Calvin Cycle)
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PHOTOPHOSPHORYLATION
process by which plants use light energy to produce ATP
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CYCLIC PHOTOPHOSPHORYLATION

  • only photosystem I is involved

  • water is not required

  • only ATP is produced

  • oxygen is not produced as a by product

  • predominant in bacteria

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P700
primary reaction center in cyclic photophosphorylation
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NONCYCLIC PHOTOPHOSPHORYLATION

  • involves both photosystem I & II

  • water is required

  • both ATP & NADPH are produced

  • oxygen is produced as a byproduct

  • occurs in plants (all green plants)

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P680
primary reaction center in noncyclic photophosphorylation
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PHOTOSYSTEM 1

  • absorb light best in 700 nm

  • longer wavelength --> P700 (700nm)

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PHOTOSYSTEM 2

  • absorb light best in 680 nm

  • shorter wavelength --> P680 (680 nm)

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PHOTOSYSTEM
they differ in wavelength they absorb
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CHLOROPHYLL
complexes from light energy to chemical energy
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P700 & P680
Chlorophyll A pairs that acts as reaction centers
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CHLOROPHYLL A

  • methyl

  • primary pigment in photosynthesis

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CHLOROPHYLL B

  • aldehyde

  • accessory pigment