The Structure of Chloroplasts
stroma :
thylakoids:
granna:
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Overview of Photosynthesis
The overall result of the Light
Reactions is the conversion of
______________ ENERGY into
_____________ ENERGY stored in
the two compounds: ___________
& ___________
The overall purpose of the CALVIN
CYCLE is to make
_________________________
from _______ & the ___________
carried by NADPH
The Light Reactions take place in the ______________________________________
What goes into the Light reactions?
1.
2.
3.
4.
What comes out of the Light Reactions?
1.
2.
3.
The Calvin Cycle (or Carbon fixation Reactions) takes place in the ________________.
What goes into the Calvin cycle?
1.
2.
3.
What comes out of the Calvin cycle?
1.
2.
3.
Concept Check 8.1 Answer for Homework!
1. What are the reactants for photosynthesis? What are the products?
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2. Name the two main stages of photosynthesis. How are the two stages related?
Light Energy and Pigments
Pigments and Color
Pigment:
Reflected Light:
Transmitted Light:
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Harvesting Light Energy
photosystems:
Clusters of pigment molecules act to do what?
Each time a pigment molecule absorbs light energy, the pigment's electrons gain energy. What
happens to the electrons in the pigment molecule?
How is sunlight energy “trapped”? What is it then used for?
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Chemical Products of Light Reactions
What molecule provides the continual supply of Electrons for the Electron Transport Chain?
__________________________
How are electrons stimulated to transfer down the Electron Transport chain?
Summarize where the energy ends up at the end of the Light Reactions:
The Light Reactions are very much like what other process that we studies?
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A Trip Around the Calvin Cycle:
If you had to rename the Calvin cycle to describe what happens there, what would
YOU call it? _____________________________________
What are the Inputs of the Calvin Cycle?
1. CO2 from the Atmosphere
The Carbon will be used to form the Sugar (Glucose)
2. ATP from Light Rx will provide the energy for the assembly of the sugarmolecule.
3. NADPH from Light Rx provides the high-energy electrons and Hydrogen ions to
assemble the sugar molecule
What are the OUTPUTS of the Calvin Cycle?
1. A high-energy
sugar called G3P
which is used to
make glucose and
many other organic
compounds.
2. ADP + P from spent
ATP molecules go
back to the light Rx
3. NADP+, which have
dropped off their
high energy
electrons, return to
the light Rx too.
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The Carbon Cycle
Trace the Carbon cycle from organic to inorganic forms.
Give an example of carbon moving from an inorganic compound to an organic compound in
the carbon cycle. Give an example of carbon moving from an organic to an inorganic
compound.
Photosynthesis and Global Climate
greenhouse effect:
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Reviewing Concepts
Multiple Choice
1. In the diagram, the part of the leaf where most photosynthesis occurs is the
a. vein.
b. mesophyll.
c. stomata.
d. air space.
2. In a plant cell, where do the light reactions of photosynthesis occur?
a. the stomata
b. the stroma
c. the thylakoids
d. the mitochondria
3. The chemical products of the light reactions are oxygen,
a. NADP+, and ADP.
b. sugar, and water.
c. carbon dioxide, and ATP.
d. ATP, and NADPH.
4. The stage of photosynthesis that uses the most ATP molecules is
a. the light reactions.
b. the Calvin cycle.
c. the electron transport chain.
d. glycolysis.
5. The Calvin cycle converts carbon dioxide to
a. ADP and NADPH.
b. water.
c. a sugar called G3P.
d. chlorophyll.
6. The process by which carbon moves from inorganic carbon dioxide to organic compounds and back is
called
a. the electron transport chain.
b. the carbon cycle.
c. the electromagnetic spectrum.
d. chromatography.
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7. Copy the concept map below and fill in the blank spaces to describe the process of
photosynthesis.
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