Chapter 10

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Chapter 10

  
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1.  Produces NADH
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B.
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2.  If plant gene alterations cause the plants to be deficient in photorespiration, what would most probably occur?
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B.
C.
D.
E.
3.  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?
A.
B.
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D.
E.
4.  Some photosynthetic bacteria (e.g., purple sulfur bacteria) have photosystem I but not II, while others (e.g. cyanobacteria) have both PSI and PSII. Which of the following might this observation imply?
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B.
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E.
5.  In autotrophic bacteria, where are the enzymes located that can carry on organic synthesis?
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6.  Where does the Calvin cycle take place?
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7.  Which of the following are products of the light reactions of photosynthesis that are utilised in the Calvin cycle?
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8.  Produces molecular oxygen (O2)
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B.
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D.
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9.  Which of the following are directly associated with photosystem I?
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10.  Cyclic electron flow may be photoprotective (protective to light-induced damage). Which of the following experiments could provide information on this phenomenon?
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11.  Generation of proton gradients across membranes occurs during
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12.  What are the products of linear photophosphorylation?
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13.  A plant has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are being absorbed by this pigment?
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14.  What does the chemiosmotic process in chloroplasts involve?
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15.  Which of the following statements best describes the relationship between photosynthesis and respiration?
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16.  Requires glucose
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17.  Requires ATP 
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D.
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18.  What are the products of the light reactions that are subsequently used by the Calvin cycle?
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D.
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19.  Photorespiration lowers the efficiency of photosynthesis by preventing the formation of
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20.  Produces NADPH
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D.
E.
21.  In a protein complex for the light reaction (a reaction center), energy is transferred from pigment molecule to pigment molecule, to a special chlorophyll a molecule, and eventually to the primary electron acceptor. Why does this occur?
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22.  Synthesis of ATP by the chemiosmotic mechanism occurs during
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23.  Which statement describes the functioning of photosystem II?
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D.
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24.  Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?
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D.
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25.  Where are the molecules of the electron transport chain found in plant cells?
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26.  P680+ is said to be the strongest biological oxidising agent. Why?
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27.  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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28.  Reduction of NADP+ occurs during
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29.  What is the primary function of the Calvin cycle? 
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30.  In a plant cell, where are the ATP synthase complexes located?
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31.   In the thylakoid membranes, what is the main role of the antenna pigment molecules?
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32.  Reduction of oxygen which forms water occurs during
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33.  When oxygen is released as a result of photosynthesis, it is a by-product of which of the following?
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34.  Which of the events listed below occur in the light reactions of photosynthesis?
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35.  Produces three-carbon sugars
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36.  Carotenoids are often found in foods that are considered to have antioxidant properties in human nutrition. What related function do they have in plants?
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37.  CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they
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38.  In any ecosystem, terrestrial or aquatic, what group(s) is (are) always necessary?
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39.  The splitting of carbon dioxide to form oxygen gas and carbon compounds occurs during
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40.  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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41.  Some photosynthetic organisms contain chloroplasts that lack photosystem II, yet are able to survive. The best way to detect the lack of photosystem II in these organisms would be
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42.  Where do the enzymatic reactions of the Calvin cycle take place?
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43.  What is the relationship between wavelength of light and the quantity of energy per photon?
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44.  If photosynthesising green algae are provided with CO2 synthesised with heavy oxygen (18O), later analysis will show that all but one of the following compounds produced by the algae contain the 18O label. That one is
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45.  Requires CO2
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46.  The reaction-center chlorophyll of photosystem I is known as P700 because
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47.  The alternative pathways of photosynthesis using the C4 or CAM systems are said to be compromises. Why?
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48.  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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49.  Why are C4 plants able to photosynthesise with no apparent photorespiration?
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50.  In mitochondria, chemiosmosis translocates protons from the matrix into the intermembrane space, whereas in chloroplasts, chemiosmosis translocates protons from
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51.  In an experiment studying photosynthesis performed during the day, you provide a plant with radioactive carbon (14C) dioxide as a metabolic tracer. The 14C is incorporated first into oxaloacetate. The plant is best characterised as a
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52.  The sugar that results from three "turns" of the Calvin cycle is glyceraldehyde-3-phosphate (G3P). Which of the following is a consequence of this?
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