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28 Cards in this Set
- Front
- Back
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Where does the Calvin cycle take place
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stroma of the chloroplast
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In autotrophic bacteria, where are the enzymes located that can carry on organic synthesis
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along the inner surface of the plasma membrane
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In the thylakoid membranes, what is the main role of the antenna pigment molecules
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harvest photons and transfer light energy to the reaction-center chlorophyll
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Which of the events listed below occur in the light reactions of photosynthesis
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light is absorbed and funneled to reaction-center chlorophyll a
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What are the products of linear photophosphorylation
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ATP and NADPH
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As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in 1 hour. You find 30,000 molecules of ATP consumed, but only 20,000 molecules of NADPH. Where did the extra ATP molecules come from?
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cyclic electron flow
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Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes?
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the synthesis of ATP
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What does the chemiosmotic process in chloroplasts involve?
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establishment of a proton gradient
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Suppose the interior of the thylakoids of isolated chloroplasts were made acidic and then transferred in the dark to a pH-8 solution. What would be likely to happen
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The isolated chloroplasts will make ATP
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In mitochondria, chemiosmosis translocates protons from the matrix into the intermembrane space, whereas in chloroplasts, chemiosmosis translocates protons from
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the stroma to the thylakoid space
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Where are the molecules of the electron transport chain found in plant cells?
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thylakoid membranes of chloroplasts
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Synthesis of ATP by the chemiosmotic mechanism occurs during
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both photosynthesis and respiration
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Reduction of oxygen which forms water occurs during
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respiration
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Reduction of NADP+ occurs during
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photosynthesis
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The splitting of carbon dioxide to form oxygen gas and carbon compounds occurs during
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neither photosynthesis nor respiration
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Generation of proton gradients across membranes occurs during
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both photosynthesis and respiration
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In thylakoids, protons travel through ATP synthase from the stroma to the thylakoid space. Therefore the catalytic "knobs" of ATP synthase would be located
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on the stroma side ofthe membrane
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Where dothe enzymatic reactions of the Calvin cycle take place
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stroma of the chloroplast
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What is the primary function of the Calvin cycle?
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synthesize simple sugars from carbon dioxide
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Produces molecular oxygen (O2)
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light reactions alone
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Requires ATP
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the Calvin cycle alone
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Produces NADH
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neither the light reactions nor the Calvin cycle
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Produces NADPH
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light reactions alone
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Produces three-carbon sugars
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the Calvin cycle alone
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Requires CO2
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the Calvin cycle alone
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Why are C4 plants able to photosynthesize with no apparent photorespiration?
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They use PEP carboxylase to initially fix CO2
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Which of the following sequences correctly represents the flow of electrons during photosynthesis?
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H2O NADPH Calvin cycle
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In mechanism, photophosphorylation is most similar to
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oxidative phosphorylation in cellular respiration
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