Chapter 10 Photosynthesis

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Chapter 10Photosynthesis
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Chapter 10Photosynthesis

• How do the reactant molecules of photosynthesis
  reach the chloroplasts in leaves?

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Chapter 10Photosynthesis

• CO2
• H2O

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Chapter 10Photosynthesis

• CO2
• H2O

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Chapter 10Photosynthesis

• How did the use of an oxygen isotope help
  elucidate the chemistry of photosynthesis?

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Chapter 10Photosynthesis

• How did the use of an oxygen isotope help
  elucidate the chemistry of photosynthesis?
• 6CO2 12H2O ?
• C6H12O6 6O2 6H2O

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Chapter 10Photosynthesis

• Describe how the two stages of photosynthesis are
  dependent on each other.

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Chapter 10Photosynthesis

• ATP
• NADPH
• LIGHT DARK

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Chapter 10Photosynthesis

• ATP
• NADPH
• LIGHT DARK
• NADP
• ADP

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Chapter 10Photosynthesis

• What color of light is least effective in driving
  photosynthesis? Explain.

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Chapter 10Photosynthesis

• What color of light is least effective in driving
  photosynthesis? Explain.

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Chapter 10Photosynthesis

• Compared to a solution of isolated chlorophyll,
  why do intact chloroplasts release less heat and
  fluorescence when illuminated?

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Chapter 10Photosynthesis
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Chapter 10Photosynthesis
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Chapter 10Photosynthesis
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Chapter 10Photosynthesis

• glucose

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Chapter 10Photosynthesis
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Chapter 10Photosynthesis
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Chapter 10Photosynthesis
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Chapter 10Photosynthesis
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Chapter 10Photosynthesis
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Chapter 10Photosynthesis

• In the light reactions, what is the electron
  donor? Where do the electrons end up?

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Chapter 10Photosynthesis

• In the light reactions, what is the electron
  donor? Where do the electrons end up?
• H2O NADPH

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Chapter 10Photosynthesis

• To synthesize one glucose molecule, the Calvin
  cycle uses _____ molecules of CO2, _____
  molecules of ATP, and _____ of NADPH.

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Chapter 10Photosynthesis

• To synthesize one glucose molecule, the Calvin
  cycle uses _____ molecules of CO2, _____
  molecules of ATP, and _____ of NADPH.

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18 12
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Chapter 10Photosynthesis

• Explain why the high number of ATP and NADPH
  molecules used during the Calvin cycle is
  consistent with the high value of glucose as an
  energy source.

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Chapter 10Photosynthesis

• Duh!

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Chapter 10Photosynthesis

• Explain why a poison that inhibits an enzyme of
  the Calvin cycle will also inhibit the light
  reactions.

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Chapter 10Photosynthesis

• ATP
• NADPH
• LIGHT DARK
• NADP
• ADP

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Chapter 10Photosynthesis

• Explain why photo respiration lowers
  photosynthetic output for plants.

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Chapter 10Photosynthesis

• Oxygen replaces CO2.
• No carbon is fixed.
• ATP is used.

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Chapter 10Photosynthesis

• How would you expect the relative abundance of C3
  versus C4 and CAM species to change in a
  geographic region whose climate becomes much
  hotter and drier?

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Chapter 10Photosynthesis

• C3 C4 CAM

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Chapter 10Photosynthesis

• C3 C4 CAM