Lecture 11 Basics: Photosynthesis Electron Energy and Respiration Overview Chloroplasts Photosynthesis overview Light Reactions Overview: Lecture 12 Page1 The Photosystem: H+ and NADPH Lecture 12 Page2 ATP Products: Chemiosmosis in Photosynthesis and Cellular Respiration Lecture 12 Page3 Calvin cycle Overview: 3 stages of the cycle: Fixation is: Reduction is: Regeneration is: Lecture 12 Page4 Summary of electron energy Lecture 12 Page5 Class Notes While you wait for class to begin: Fill in the following in this cartoon chloroplast (without looking at your basics notes): 1. What is made in the “thylakoid?” 2. Use them to make sugar in the “stroma.” 3. Indicate where light, water, oxygen, carbon dioxide and H+ are used. chloroplast Plant cell An apple consists of mostly water and carbohydrates. Where does carbon in the carbohydrates come from? A. Molecules in the water B. Molecules in the air C. Molecules in the soil D. Fertilizer in the soil Lecture 12 Page6 Radish seeds were placed in these environments. Rank them from highest mass to lowest mass. Explain what is occurring in dish 2 and dish 3 in regards to photosynthesis, cellular respiration, and where the nutrients for plant growth come from. Dish 2 Dish 3 Lecture 12 Page7 Plants and animals in enclosed environments. In 1772, Joseph Priestly conducted the following experiments, sealing three things inside glass jars: A mouse alone a mouse and a plant a plant alone What happened in each case? Why? Old Exam Questions Plants need products from the light reactions to fix carbon and make organic molecules during the Calvin cycle. These products are: A. Made by splitting of oxygen B. Captured by chlorophyll C. Made by reducing water D. ATP and NADPH Tomato plants in my closet were growing nicely when a power outage caused the grow lights to go off for 3 days. Which of the following processes allowed the plants to continue to generate ATP in the absence of light? A. Lactic acid fermentation B. Light reactions C. Cellular respiration D. Calvin cycle E. Dark reactions Lecture 12 Page8 Scientists discovered a plant with a mutant channel in the thylakoids that allowed H+ ions to leak across the thylakoid membrane down their concentration gradient. As a result of this mutation: a. sugar production was reduced b. more NADPH was formed c. the pH inside the thylakoid was lower than normal plants d. electron transport was inhibited e. ATP synthesis increased to compensate Lecture 12 Page9