Week 4b Photosynthesis v2-2
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University of California, Los Angeles *
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Course
7A
Subject
Biology
Date
Dec 6, 2023
Type
Pages
4
Uploaded by HighnessHawkMaster2432
Name ____________________Sophia Wall____________
Photosynthesis Pre-Class Worksheet
Fill out this worksheet as you complete your pre-class assignments. Bring your completed worksheet to class to use as a
reference for in-class activities.
After completing your pre-class assignments (Reading Ch. 8 Introduction; 8.1, 8.2, 8.3), you should be able
to:
•
Connect redox reactions to energy transformations that occur throughout photosynthesis.
•
Identify
where the different stages of photosynthesis take place.
•
Explain how the Calvin Cycle transforms carbon dioxide into sugar and where the energy for this transformation
comes from.
•
Describe the role of Rubisco in the process of photosynthesis.
•
Explain how light energy reaches photosystem reaction centers and what happens when it gets there.
1. Write the overall chemical reaction for photosynthesis:
Energy+6CO2+12H2O=C6H12O6+6O2+6H2O
Energy+Carbon Dioxide+Water = Glucose+Oxygen+Water
2. Imagine you are trying to explain the process of photosynthesis to
your friend who is also taking LS7A. You show them the figure to the
right. Provide an explanation for what this figure represents. Be sure
to define the terms
oxidation, reduction, NADPH,
and any other terms
in the diagram you think your friend would not already know.
Oxidation- this is the chemical reaction where a molecule loses an
electron and therefore releases energy
Reduction- this is the chemical reaction where a molecule gains
electrons and therefore energy
NADPH- this is an electron carrier and reducing agent that is present in
the Calvin Cycle portion of photosynthesis.
This figure represents the two stages of photosynthesis, carbon fixation and light capture. These stages are crucial in
order to use the energy in sunlight that is passed over to NADPH to convert carbon dioxide to carbohydrates
3. The diagram below represents a chloroplast. On the diagram, label the outer membrane, inner membrane, thylakoid
membrane, thylakoid lumen, and stroma.
Outer membrane- the outside layer of the double layered wall
Inner membrane- the inside layer of the double layered wall
Thylakoid membrane- the ovular, connected structures
Thylakoid lumen- the interior compartments of the thylakoid membrane
Stroma- the region inside the wall surrounding the thylakoid
4. Fill in the table below to keep track of the major events of each stage of photosynthesis. When considering reactants
and products, you don’t need to keep track of all of the intermediate molecules in each pathway.
Stage of
Photosynthesis
Where does
this occur in a
eukaryotic cell?
What
reactants are
required for
this process?
What
products are
made during
this process?
Additional Notes
Light-Harvesti
ng Reactions
Chloroplast
NADP, ADP,
Water
NADPH, ATP,
Oxygen
There are two photosystems that are
connected by an electron transport
chain
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QUESTION 1
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