Every kid from Grade 4 onwards knows that photosynthesis involves light. Remind me, what do photons of light specifically do in photosynthesis? A. They make chlorophyll easier to oxidize. B. They remove electrons from H20, releasing oxygen into the atmosphere. C. They convert carbon dioxide into a carbohydrate (glucose) D. They reduce P680+ to P680.
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- The Calvin cycle begins when CO2 reacts with (a) phosphoenolpyruvate (b) glyceraldehyde-3-phosphate (c) ribulose bisphosphate (d) oxaloacetate (e) phosphoglycerateEvery kid from Grade 4 onwards knows that photosynthesis involves light. Remind me, what do photons of light specifically do in photosynthesis? A. They remove electrons from H2O, releasing oxygen into the atmosphere. B. They reduce P680+ to P680. C. They convert carbon dioxide into a carbohydrate (glucose) D. They make chlorophyll easier to oxidize.Put the steps for the formation and usage of ATP in photosynthesis in order. 1. Hydrogen ions will diffuse out of the thylakoid; the concentration of H+ ions inside the thylakoid is higher than outside. 2. ATP synthase adds a phosphate group to ADP to form ATP. 3. Potential energy is stored, so hydrogen ions can now diffuse out through protein channels in the thylakoid membranes.
- Which of the following statements about the light reactions of photosynthesis are correct? 1. Absorption of light does one thing: it makes chlorophyll easier to oxidize. 2. In PSII, the rate of damage to the D1 protein can never exceeds the rate of repair. 3. Electron transport is spontaneous (exergonic) as electrons move from P680* to P700+. 4. Compared to anoxygenic photosynthesis, in oxygenic photosynthesis less light needs to be absorbed to reduce NADP+. A. 1,2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1,2,3 and 4 are correct43. Where do electrons from Photosystem I go after they get excited by light? Group of answer choices a. The high-energy electron travels down a short second leg of the electron transport chain. At the end of the chain, the electron is passed to NADP+ to make NADPH. b.They travel down a second electron transport chain and are donated to oxygen which then bonds to hydrogen ions to form water. c. The high-energy electron travels down a short second leg of the electron transport chain and they are donated to ADP, which is then converted to ATP. d. They remain excited and then they travel to Photosystem II where they get even more excited until they spontaneously combust.d) In the presence of sunlight, an electrochemical gradient is generated between two of the spaces within the chloroplast. 1.Describe what happens when a photon of light energy hits a molecule of chlorophyl. 2. What is meant by the term electrochemical gradient? 3.What role does the photosynthetic electron transport chain play in the generation of the electrochemical gradient? 4. Two chemical reactions also contribute to the generation of the electrochemical gradient. What are the reactions, where do they occur, and why do these factors affect the gradient? 5. The electrochemical gradient can be utilised by ATP synthase to generate ATP - explain how the location and structure of ATP synthase enable it to perform this function. e) The light reactions of photosynthesis generate ATP and NADPH for use in the dark reactions (i.e., the Calvin cycle). Why are they needed?
- A. The C4 plant performs photosynthesis more efficiently than the C3 when the CO2 concentration is 600ppm or less. Provide one reason why the rate of photosynthesis doesn’t change for the C4 plant when the CO2 concentration increases above 400 ppm. B. Discuss what is happening in the C3 plant when the CO2 levels are below 50 ppm. Provide one reason why this does NOT happen to the C4 plant.44. What does light do when it strikes the chlorophyll molecules of Photosystems I and II? Group of answer choices a. Light causes glucose to be synthesized directly inside the chlorophyll molecules of photosynthesis. b. Light causes the conversion of water into carbon dioxide, oxygen and electrons. c. Light directly causes the carbon dioxide to attach to RuBP during the carbon fixation stage of the Calvin Cycle. d. Light causes electrons to get excited and travel down an electron transport chain embedded in the thylakoid membrane.of the claSS. 1. How do plants acquire the starting reactants of photosynthesis (CO, and H,O)? What do plants do with the products of photosynthesis (O, and carbohydrates)? 2. A plant may be using more energy to fuel life processes (cell respiration) than it is taking in through photosynthesis either because its cell respiratory rate is elevated or because photosynthetic rate is diminished. a. What is one potential reason why a plant may be forced to elevate its cell respiratory rate? b. What is one potential reason for why a plant may experience diminished photosynthetic rates? 65 1161_Ch_12_M....pptx
- his compound is made during photosystem II. Select one: a. cellulose b. oxygen c. glucose d. glyceraldehyde-3-phosphate e. sucrose This compound is made during photosystem II. Select one: a. oxygen b. glucose c. glyceraldehyde-3-phosphate d. sucrose e. cellulose40. After light excites electrons and they leave Photosystem II to travel down the electron transport chain. How are these electrons replaced in Photosystem II? Group of answer choices a. Oxygen is reduced and the electrons are given to the chlorophyll molecules of photosystem II. b. Carbon Dioxide is split, and the electrons are given to the chlorophyll molecules of photosystem II. c. Water is split, and the electrons are given to the chlorophyll molecules of Photosystem II. d. Hydrogen undergoes fusion and the electrons are given to the chlorophyll molecules of photosystem IIA. Explain the role of ATP in life process. B. Complete the following table by comparing and contrasting the light-dependent and light-independent reactions of photosynthesis. You may use the link below for reference. https://youtu.be/KfvYQgT2M-k Light- independent reactions Point of Light-dependent reactions Comparison 1. Raw materials 2. Part of the chloroplasts where they occur 3. Light requirements 4. Products 15. Ву-products