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Biology 1A Section 1 Study Questions 5

Biology 1A Section 1 Study Questions 5 - Bio 1A – Study...

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Unformatted text preview: Bio 1A – Study Questions, Photosynthesis Please remember that these are questions to help you organize the material. For the exam, you are responsible for all of the topics covered in the lecture and in the assigned chapters/pages of the textbook. Please work through the problems in the textbook to test yourself as you study. 1. What are the products of the light and CO2‐fixing reactions of photosynthesis and where do these two processes occur in the eukaryotic photosynthetic cell? 2. Name two pigments that are present in the photosynthetic cell of a higher plant and describe the function of each. 3. What is a reaction center and what is its function in photosynthesis? Describe the role of the reaction center in the primary reaction of photosynthesis. 4. Describe the structure of the chloroplast and the functions of its different parts. 5. What is a “photosystem” and how do the two photosystems in the chloroplast cooperate in transferring electrons to NADP+? What does Photosystem I in chloroplasts do? 6. Draw the path for electron transfer from water to NADP+. 7. Suppose you have a specific inhibitor that blocks cytochrome oxidation and reduction. Explain why this inhibitor stops the following reactions: photophosphorylation; NADP+ reduction; CO2 fixation. 8. How does non‐cyclic phosphorylation differ from cyclic phosphorylation? 9. How do chloroplasts synthesize ATP in the light? What part of the chloroplast becomes acidified during this process? 10. What is the identity of the first compound that reacts with CO2 in the light in a C3 plant, and what is the product of this reaction? 11. Name some differences between C3 and C4 plants in terms of CO2 fixation. How does a CAM plant compare to the other two types of plants? 12. What is photorespiration, and why is this process deleterious? ...
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