Kami Export - Week 4b Photosynthesis

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University of California, Los Angeles *

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7B

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Biology

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Dec 6, 2023

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pdf

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2

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Name _____________________________________________ 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: 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. 3. The diagram below represents a chloroplast. On the diagram, label the outer membrane, inner membrane, thylakoid membrane, thylakoid lumen, and stroma.
4. Fill in the table below to keep track of the major events of each stage of photosynthesis. When considering reactants and p roducts, 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-Harvesting Reactions Calvin Cycle 5. The diagram below represents the components of the light-harvesting reactions. On the diagram label the stroma and the thylakoid lumen. Indicate where proton (H+) concentration is low and where it is high. Show where photons are absorbed, where water is split, where NADP+ is reduced, and where ATP is synthesized. Finally, draw arrows to represent the movement of electrons and protons (H+) through this system. 6. The diagram below represents the Calvin Cycle. Use this diagram to answer the following questions. a. What is Rubisco? Indicate on the diagram where Rubisco is involved and what it does. b. ATP and NADPH provide the energy needed to convert CO 2 into sugar. Where do the ATP and NADPH used in the Calvin Cycle come from? What happens to the ADP and NADP+ produced by the Calvin Cycle?
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