Name: _________________________________________
Study Guide Unit 3- Photosynthesis
1. Contrast autotroph from heterotroph and list an
example of each.
2. What are the three stages of photosynthesis and
which of these stages are dependent on light?
Date: ___________________
6. Is the electron transport chain (ETC) part of the
light dependent or light independent reactions?
Explain your reasoning.
7. Explain photolysis.
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8. Circle the appropriate word for each fragment.
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ATP and NADPH are products/ reactants for the light
dependent stage and products/ reactants for the light
independent stage of photosynthesis.
3. What are the four steps of the light dependent
reactions of photosynthesis?
9. What do plants have that animal cells do not?
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10. How are cyanobacteria and plants alike?
Different?
4. Where do the light dependent reactions take place
in the plant cell?
11. What are pigments and where are they located
inside photosynthesizing organisms?
5. Draw out the light dependent reaction occurring
inside a thylakoid membrane and number where the
steps take place.
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12. Do you think endosymbiosis is what really
happened? Explain.
16. How do photosynthesizing organisms such as
trees use the electrons to make NADPH, an energy
carrying molecule?
13. Diagram out endosymbiosis theory and
determine whether it’s a form of active transport or
passive transport.
17. What happens to the oxygen when water is split
inside the thylakoid membrane of a chloroplast
inside a photosynthesizing organism?
18. Explain why oak trees leaves are green instead of
purple.
14. When water is split during the light dependent
reaction, where do the H+ ions go? What form of
transport is occurring (diffusion, facilitated diffusion
or active transport)?
19. Cyanobacteria are often blue in color. Explain this
phenomenon using the terms reflection and
absorption.
15. How do photosynthesizing organisms such as
trees use the H+ ion concentration gradient to make
the energy carrying molecule ATP?
20. What specific process or stage of photosynthesis
does this diagram represent?
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21. What specific process or stage of photosynthesis
does this diagram represent?
25. What does the enzyme Rubisco do?
26. This figure summarizes both major stages of
photosynthesis.
22. What is Stage 3 of photosynthesis? Does it occur
during the day, during the night or both day and
night? Explain.
Fill out the Table using the Diagram above and the
equation below:
6CO2 + 6H2O + light energy  C6H12O6 + 6O2
Process
23. True or False: Light Independent Reactions
are a form of CO2 Fixation. Explain.
Location
Reactants
(Inputs)
Products
(Outputs)
Light
Dependent
Reactions
Light
Independent
Reactions
(Calvin Cycle)
24. Explain the overall process of the Calvin
Cycle and where it occurs in plant cells.
27. What happened to the Elodea leaf cells when you
put a drop of salt water and viewed it beneath the
microscope?
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28. Give an example of monomer and a polymer of
carbohydrates.
29. Carry out a dehydration synthesis with the
following molecules and label them.
Potential Free Response Questions
-Historical Analysis on Photosynthesis- interpreting
data
 Von Helmont’s experiment growing willow
sapling in soil
 Joseph Priestly’s experiment burning candle
and placing mint leaf inside covered
container
-Interpreting Absorbency Graphs
 Color absorbed and reflected with respective
wavelengths
-Dehydration Synthesis and Hydrolysis of Sugars
-Diagraming and explaining light reactions
-Diagraming and explaining Calvin Cycle
New Chlorophyll Discovered Article
30. Carry out the hydrolysis using the following
molecule and label it.
+ H2O
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