of the claSS. 1. How do plants acquire the starting reactants of photosynthesis (CO, and H,0)? 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

1. Describe how GAP produced by the Calvin cycle is converted to sucrose, starch, and cellulose 2. What is the apparent advantage of photorespiration? How do plants minimize photorespiration?.

7. Start with a photon of sunlight and a carbon atom in a molecule of carbon dioxide in the atmosphere: model/diagram their pathway from that starting point to their final destination as a molecule of glucose that is used for energy in the cells of the plant stem. Following your diagram/model, provide a written explanation for what your diagram/model depicts. Make sure both your model and explanation are clear, concise, and have the appropriate level of detail to clearly demonstrate you understand photosynthesis, cellular respiration, and the movement of mass and energy in plants.

3. For every 3 turns of the Calvin Cycle, 1 molecule of G3P (Glyceraldehyde-3-Phosphate) is produced. Figure #1: The structure of a G3P molecule → Figure #2: shown below is a visual showing how 3 spins of the Calvin cycle creates one G3P. 3C02₂ RuBisCO Stage 1: carbon fixation 3 ADP 3 ATP Calvin Cycle 6 ATP 6 ADP Stage 3: regeneration. of RuBP 6 NADPH -6 NADP+H* G3P or (C,H,O,P) Figure #2: The Calvin Cycle (this represents three turns of the cycle) Answer the following questions using your understanding of the Calvin Cycle to make one maltose molecule → this is 2 molecules of glucose (C&H12O) attached with a glycosidic bond. Explain what would happen to the glucose output in the light independent reactions if there were only linear electron transport (LET) in the light dependent reactions? Stage 2: reduction

Every 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.

The use of the C4 pathway for initial carbon fixation (CO2 into a 4C compound) I. occurs only in plants with specialized leaf anatomy containing bundle sheath cells surrounded by a ring of mesophyll cells II. occurs during the day in CAM plants III. reduces the problems of photorespiration by isolating the enzyme PEP carboxylase from high levels of dissolved O2

Are you hungry? could use a light snack. 86. The main pigment of photosynthesis is: a. chlorophyll a b. chlorophyll b c. carotenoids d. All of the above are correct. 87. What is not part of a photosystem: a. antenna complex b. reaction center c. chlorophyll d. ATP synthase pump 88. The light-dependent reactions take place in the: 4+ a. stroma b. cytoplasm c. thylakoid membranes d. matrix 89. In the light-dependent reactions, ATP is produced via: 90. What is the first step in the light dependent reactions? a. Light hits photosystem I. b. Electrons are transferred to b6-f complex. c. Light hits photosystem II. d. Protons are pumped across the membrane. 91. Where do the electrons and protons used in the light-dependent reactions come from: a. H₂O b. CO₂ c. RuBP d. PGAL a. oxidative phosphorylation (electron transport system). b. substrate-level phosphorylation.

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Please help me answer questions 71 & 77 71. Which of the following are examples of kinetic energy? A. protons moving through ATP synthase, ATP B. electrons in chemical bonds proton gradient, ATP. C. electrons moving through the electron transport chain. protons moving through ATP synthase D. All answer choices are correct. E. electrons moving through the electron transport chain, proton gradient 77. The product of photosystem I is A. ANDPH B. Water C. ATP. D. glucose E. NADH

1. Why is water split by PSII in the light reactions? 2.  How is ATP synthesis powered in the light reactions? How does this compare to the oxidative phosphorylation of Cellular Respiration?