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Chapter 10
Photosynthesis
Chapter 10
Photosynthesis
How do the reactant
molecules of photosynthesis
reach the chloroplasts in
leaves?
Chapter 10
Photosynthesis
CO2
H2O
Chapter 10
Photosynthesis
CO2
H2O
Chapter 10
Photosynthesis
How did the use of an oxygen
isotope help elucidate the
chemistry of photosynthesis?
Chapter 10
Photosynthesis
How did the use of an oxygen
isotope help elucidate the
chemistry of photosynthesis?
6CO2 + 12H2O →
C6H12O6 + 6O2 + 6H2O
Chapter 10
Photosynthesis
Describe how the two stages
of photosynthesis are
dependent on each other.
Chapter 10
Photosynthesis
ATP
NADPH
LIGHT
DARK
Chapter 10
Photosynthesis
ATP
NADPH
LIGHT
DARK
NADP+
ADP
Chapter 10
Photosynthesis
What color of light is least
effective in driving
photosynthesis? Explain.
Chapter 10
Photosynthesis
What color of light is least
effective in driving
photosynthesis? Explain.
Chapter 10
Photosynthesis
Compared to a solution of
isolated chlorophyll, why do
intact chloroplasts release
less heat and fluorescence
when illuminated?
Chapter 10
Photosynthesis
Chapter 10
Photosynthesis
Chapter 10
Photosynthesis
Chapter 10
Photosynthesis
glucose
Chapter 10
Photosynthesis
Chapter 10
Photosynthesis
Chapter 10
Photosynthesis
Chapter 10
Photosynthesis
Chapter 10
Photosynthesis
Chapter 10
Photosynthesis
In the light reactions, what is
the electron donor? Where do
the electrons end up?
Chapter 10
Photosynthesis
In the light reactions, what is
the electron donor? Where do
the electrons end up?
H2O
NADPH
Chapter 10
Photosynthesis
To synthesize one glucose
molecule, the Calvin cycle
uses _____ molecules of CO2,
_____ molecules of ATP, and
_____ of NADPH.
Chapter 10
Photosynthesis
To synthesize one glucose
molecule, the Calvin cycle
6 molecules of CO ,
uses _____
2
18 molecules of ATP, and
_____
12 of NADPH.
_____
Chapter 10
Photosynthesis
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.
Chapter 10
Photosynthesis
Duh!
Chapter 10
Photosynthesis
Explain why a poison that
inhibits an enzyme of the
Calvin cycle will also inhibit
the light reactions.
Chapter 10
Photosynthesis
ATP
NADPH
LIGHT
DARK
NADP+
ADP
Chapter 10
Photosynthesis
Explain why photo respiration
lowers photosynthetic output
for plants.
Chapter 10
Photosynthesis
Oxygen replaces CO2.
No carbon is fixed.
ATP is used.
Chapter 10
Photosynthesis
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?
Chapter 10
Photosynthesis
C3
C4
CAM
Chapter 10
Photosynthesis
C3
C4
CAM