MB CH 10 – Flashcards
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Which process produces oxygen?
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Photosynthesis
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Which set of reactions uses H2O and produces O2?
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The light-dependent reactions
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What is the importance of the light-independent reactions in terms of carbon flow in the biosphere?
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The light-independent reactions turn CO2, a gas, into usable carbon in the form of sugars.
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True or false? The light-dependent reactions of photosynthesis use water and produce oxygen.
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True
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Which of the following molecules is the primary product of photosystem I?
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NADPH
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What is the biological significance of the light-independent reactions of photosynthesis?
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They convert carbon dioxide to sugar.
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Which of the following statements best describes the relationship between the light-dependent and light-independent reactions of photosynthesis?
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The light-dependent reactions produce ATP and NADPH, which are then used by the light-independent reactions.
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Which of the following reactions ensures that the Calvin cycle can make a continuous supply of glucose?
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Regneration of RuBP
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In C3 plants the conservation of water promotes _____.
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photorespiration
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In C4 and CAM plants carbon dioxide is fixed in the _____ of mesophyll cells.
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cytoplasm
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C4 plants differ from C3 and CAM plants in that C4 plants _____.
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transfer fixed carbon dioxide to cells in which the Calvin cycle occurs
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The light reactions of photosynthesis supply the Calvin cycle with
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ATP and NADPH.
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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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How is photosynthesis similar in C4 plants and CAM plants?
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In both cases, rubisco is not used to fix carbon initially.
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Which of the following does not occur during the Calvin cycle?
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release of oxygen
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In the electromagnetic spectrum, the type of radiation that we call visible light occurs between _____.
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ultraviolet radiation and infrared radiation
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Which of the following is a product of the light reactions of photosynthesis?
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oxygen, ATP, and NADPH
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The overall function of the Calvin cycle is _____.
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making sugar
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C4 plants occur more commonly in desert conditions because _____.
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they can fix carbon at the lower CO2 concentrations that develop when the stomata are closed
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What is the basic role of CO2 in photosynthesis?
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CO2 is fixed or incorporated into organic molecules.
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Select the most accurate statement describing the basic function of the light reactions of photosynthesis.
-The basic function of the light reactions of photosynthesis is the trapping of light energy.
-The basic function of the light reactions of photosynthesis is the conversion of solar energy to chemical energy.
-The basic function of the light reactions of photosynthesis is the production of glucose.
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The basic function of the light reactions of photosynthesis is the conversion of solar energy to chemical energy.
