Assigned Reading - Photosynthesis PDF

Preview

Summary

Download Assigned Reading - Photosynthesis PDF

Description

Photosynthesis Pages 107 – 121 *if you are writing it out, then it is due as you walk in the classroom, otherwise, it is to be electronically submitted via Google Classroom Directions: Read assigned chapter/pages and complete the following questions. As you write your response, please include the page number where you found the information. If you used other literature to formulate your response please cite your source. IBDP CORE TOPIC 2.9: MOLECULAR BIOLOGY - PHOTOSYNTHESIS IB AHL TOPIC 8.3: METABOLISM, CELL RESPIRATION AND PHOTOSYNTHESIS 1. REVIEW – Please refer to chapter 4 in your text for question 1. a. Draw the structure of a plant cell. Label and annotate the structures that are exclusively found in plant cells. 2. Distinguish between grana, thylakoids, and stroma in their structure and function. 3. Distinguish between oxidation and reduction. a. Write the equation for photosynthesis. b. Name those molecules that are oxidized and those that are reduced. 4. Identify the role of each of the following molecules during photosynthesis: f. Carbon dioxide a. Water g. Oxygen b. Light energy (white light) h. NADPH c. Electrons i. ATP d. Pigments (chlorophyll and j. H+ ions carotenoids) e. Glucose (sugars) k. Enzymes 5. What is photophosphorylation? What is carbon fixation? 6. Contrast the major events that occur during the light-dependent reactions with those that occur during the Calvin cycle (light-independent reactions). 7. Draw a sketch of the action and absorption spectra. a. Explain the difference between absorption and action spectra. b. What conclusions can be drawn from each? 8. The light-dependent reactions: a. What forms the reaction center in a photosystem? b. Contrast photosystem I with photosystem II. c. Contrast cyclic and noncyclic electron flow. 9. Contrast the chemiosmotic mechanism for ATP formation in the mitochondrion to that in a chloroplast (you may need to consult the cellular respiration and/or the cell chapters for this). 10. Describe the overall role of the Calvin cycle in photosynthesis. a. How is the Calvin cycle dependent on the light reactions? b. Name the enzyme that “fixes” CO2 ? c. What substances are supplied to the light reactions from the Calvin cycle? 11. What is photorespiration? When does it occur? How is it a disadvantage to plants?

12. Contrast C3, C4 and CAM plants. Name examples of each and describe the environment in which they normally live. a. Contrast the internal anatomy of their leaves. b. Explain the role of PEP carboxylase in C4  plants....