Which substance (or substances) is/are oxidized in the light dependent reactions of photosynthesis? Which substance (or substances) is/are reduced in the light dependent reactions of photosynthesis? Which substance (or substances) is/are reduced in the Calvin cycle reactions of photosynthesis? Visible light energy is used in the light-dependent reactions. Describe how
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- Describe the purpose of the light dependent reaction and light independent reaction (carbon fixation reaction) in photosynthesis. In addition, explain how the products of the light dependent reaction are used in the light independent reaction (carbon fixation reaction)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 correctIn photosynthesis, contrast the light reactions with the light independent reactions, in terms of goals, inputs, and outputs of each. Spatially where do they take place (which parts of the chloroplast)? (Optional, for further discussion: Could there be light reactions without light-independent reactions, or visa-versa?)
- Identify the chemical basis for ApH and AY across the chloroplast thylakoid membrane by dragging the descriptions to their targets. Be sure to notice that the upper arrow iindicates ApH and the lower arrow indicates ΔΨ. ATP synthase complex H+ N ADP + P₁ Light energy ATP H*N Photosystem I/II- Chloroplast N side Aus PN ApH T + Thylakoid membrane HTp H+p Lumen Stroma P side Proton circuit A B High H concentration Low positive charge High positive charge Low H+ concentration Within the image, identify the types of proton translocation by dragging each label to its target. O XH₂ 2H+ + Z 2 H* ZH₂ O XH₂ Z 2H+ ZH₂ 2H+ C A B Proton pump Redox loopATP is produced by chemiosmosis in photosynthesis". Identify where and how this chemical gradient is formed?how this is driving the ATP synthesis. Mention where the light dependent and light independent reactions of photosynthesis take place along with the functional end product(s) of these two stages. Dark and light reactions of photosynthesis are interconnected, how?If Photosystem I is inhibited, will H+ still be pumped into the thylakoid space? No, because the electron flow would be stalled Yes, because ATP synthase would still pump H+ Yes, because Photosystem II is after the Electron Transport Chain O No, because Photosystem I is before the Electron Transport Chain You are working at a biotech company that is studying new enzymes from plant cells to produce biofuels. You know that one of the substrates of the enzyme is the hydrocarbon tails of fatty acids. Which amino acid might you expect to find in the active site of the enzyme? O glutamic acid O tryptophan serine histidine If you modified the tail of chlorophyll to be polar, which of the following would you expect to happen to light energy? Light would not be absorbed by chlorophyll Light would be absorbed but the energy would be lost as fluorescence/heat since the chlorophyll would not interact with the membrane reaction center O Light would be absorbed and the electron would remain in an…
- Briefly explain the light-dependent reactions of photosynthesis: where does this take place, what are the reactants and what is produced?Step Input Output Light Dependent Reactions Light Independent Reactions (Dark Reactions) Write the full chemical equation for photosynthesis below: Eactors that Affect Photosynthesis Gas exchange usually results in a loss of o Desert plants have special, • Photosynthesis has an optimal and is limited by amounts of Section 3: Cellular Respiration (Aerobic Respiration) All living things need The food ( is broken down to and energy is released in the form of Write the chemical equation for cellular respiration below: Step 1: Glycolysis step process that breaks down into two smaller Results in small amounts of Does not require (anaerobic) Occurs outside Input Output © 2020 to present Keystone Sclence - All Rights Reserved www.teacherspayteochers.com/Store/Keystone-ScienceWhere is the electrochemical gradient located in the chloroplast? Why is it important? Why are the Light Independent Reactions important? Name the 3 stages of the Calvin Cycle? What is the function of ribulose bisphosphate, RUBISCO, glyceraldehyde 3- phosphate in the Calvin Cycle? How much energy is utilized? What is Carbon Fixation? What is Photorespiration? Why is it wasteful? Why are some plants called C4 plants and why are they important? How have they adapted to unfavorable climatic conditions? How do the activities of C4 plants compare with the activities of CAM plants?
- Choose all that apply: The final electron acceptor(s) associated with photosystem II is/are: NADP+ 02 Photosystem I ATPWhich of the following correctly sequences the steps of non-cyclic electron transport? * Water is oxidized by the capture of light energy; these excited electrons are passed through the dark reactions, returning to chlorophyll during the final light reactions The ATP and NADPH generated by the reactions of photosystem Il and photosystem I are utilized by the Calvin Cycle to build high energy glucose molecules Electrons donated from water molecules pass through photosystem I then O photosystem II before returning to the chlorophyll molecules, generating ATP in the process Chlorophyll molecules absorb UV radiation exciting electrons which flow through photosystem I, returning to the chlorophyll molecules ) This is a required questionWhich of the following is NOT true of photosynthesis? O The light-independent ("dark") reaction makes glucose from carbon dioxide (CO₂) and water, using energy trapped by the light-dependent reaction The light-dependent reaction captures electrons in NADPH, which are used for glucose synthesis in the light-independent ("dark") reaction None of the other four answers (all are true of photosynthesis) Light-excited electrons in chlorophyll provide the energy for ATP production The light-independent ("dark") reaction converts light energy to chemical energy stored in ATP