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66 Cards in this Set
- Front
- Back
1) If photosynthesizing green algae are provided with CO2 synthesized with heavy oxygen (18O), later analysis |
E) O2. |
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2) Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin |
E) ATP and NADPH |
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3) What are the products of the light reactions that are subsequently used by the Calvin cycle? |
E) ATP and NADPH |
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4) Where does the Calvin cycle take place? |
A) stroma of the chloroplast |
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5) In any ecosystem, terrestrial or aquatic, what group(s) is (are) always necessary? |
D) autotrophs |
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6) In autotrophic bacteria, where are the enzymes located that can carry on organic synthesis? |
E) along the inner surface of the plasma membrane |
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7) When oxygen is released as a result of photosynthesis, it is a by-product of which of the following? |
B) splitting the water molecules |
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8) A plant has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What |
B) blue and violet |
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Theodor W. Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different |
C) Bacteria congregated in these areas because these areas had the most oxygen being released. |
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Theodor W. Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different |
D) the relationship between wavelengths of light and the oxygen released during photosynthesis. |
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Theodor W. Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different |
B) The bacteria would be relatively evenly distributed along the algal filaments. |
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15) In the thylakoid membranes, what is the main role of the antenna pigment molecules? |
B) harvest photons and transfer light energy to the reaction-center chlorophyll |
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16) The reaction-center chlorophyll of photosystem I is known as P700 because |
B) this pigment is best at absorbing light with a wavelength of 700 nm. |
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17) Which of the events listed below occur in the light reactions of photosynthesis? |
E) light is absorbed and funneled to reaction-center chlorophyll a. |
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18) Which statement describes the functioning of photosystem II? |
D) The electron vacancies in P680 are filled by electrons derived from water. |
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19) Which of the following are directly associated with photosystem I? |
B) receiving electrons from plastocyanin |
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20) Some photosynthetic organisms contain chloroplasts that lack photosystem II, yet are able to survive. The best |
B) to test for liberation of O2 in the light. |
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21) What are the products of linear photophosphorylation? |
C) ATP and NADPH |
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22) As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in 1 hour. |
C) cyclic electron flow |
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23) Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the |
D) the synthesis of ATP |
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24) What does the chemiosmotic process in chloroplasts involve? |
A) establishment of a proton gradient |
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25) Suppose the interior of the thylakoids of isolated chloroplasts were made acidic and then transferred in the |
A) The isolated chloroplasts will make ATP. |
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26) In a plant cell, where are the ATP synthase complexes located? |
D) A and C |
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27) In mitochondria, chemiosmosis translocates protons from the matrix into the intermembrane space, whereas in |
C) the stroma to the thylakoid space |
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28) Which of the following statements best describes the relationship between photosynthesis and respiration? |
B) Photosynthesis stores energy in complex organic molecules, while respiration releases it |
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29) Where are the molecules of the electron transport chain found in plant cells? |
A) thylakoid membranes of chloroplasts |
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30) Synthesis of ATP by the chemiosmotic mechanism occurs during |
C) both photosynthesis and respiration. |
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31) Reduction of oxygen which forms water occurs during |
B) respiration |
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32) Reduction of NADP+ occurs during |
A) photosynthesis |
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33) The splitting of carbon dioxide to form oxygen gas and carbon compounds occurs during |
D) neither photosynthesis nor respiration |
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34) Generation of proton gradients across membranes occurs during |
C) both photosynthesis and respiration |
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35) What is the relationship between wavelength of light and the quantity of energy per photon? |
B) They are inversely related. |
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36) In a protein complex for the light reaction (a reaction center), energy is transferred from pigment molecule to |
C) The molecular environment lets it boost an electron to a higher energy level and also to transfer the |
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37) P680+ is said to be the strongest biological oxidizing agent. Why? |
D) This molecule results from the transfer of an electron to the primary electron acceptor of photosystem II |
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38) Some photosynthetic bacteria (e.g., purple sulfur bacteria) have photosystem I but not II, while others (e.g. |
B) Photosystem I must be more ancestral. |
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39) Cyclic electron flow may be photoprotective (protective to light-induced damage). Which of the following |
A) using mutated organisms that can grow but that cannot carry out cyclic flow of electrons and compare |
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40) Carotenoids are often found in foods that are considered to have antioxidant properties in human nutrition. |
B) They dissipate excessive light energy. |
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41) In thylakoids, protons travel through ATP synthase from the stroma to the thylakoid space. Therefore the |
D) on the stroma side of the membrane. |
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42) Which of the following statements best represents the relationships between the light reactions and the Calvin |
A) The light reactions provide ATP and NADPH to the Calvin cycle, and the cycle returns ADP, Pi, and |
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43) Where do the enzymatic reactions of the Calvin cycle take place? |
A) stroma of the chloroplast |
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44) What is the primary function of the Calvin cycle? |
E) synthesize simple sugars from carbon dioxide |
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For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants. |
A) light reactions alone |
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For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants. |
B) the Calvin cycle alone |
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For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants |
D) neither the light reactions nor the Calvin cycle |
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For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants. |
A) light reactions alone |
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For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants |
B) the Calvin cycle alone |
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For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants |
B) the Calvin cycle alone |
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For the following questions, compare the light reactions with the Calvin cycle of photosynthesis in plants |
D) neither the light reactions nor the Calvin cycle |
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52) The sugar that results from three ʺturnsʺ of the Calvin cycle is glyceraldehyde-3-phosphate (G3P). Which of |
D) The formation of starch in plants involves assembling many G3P molecules, with or without further |
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53) In the process of carbon fixation, RuBP attaches a CO2 to produce a 6 carbon molecule, which is then split in |
D) regeneration of rubisco |
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57) In metabolic processes of cell respiration and photosynthesis, prosthetic groups such as heme and iron -sulfur |
E) both oxidize and reduce during electron transport |
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58) The pH of the inner thylakoid space has been measured, as have the pH of the stroma and of the cytosol of a |
A) The pH within the thylakoid is less than that of the stroma. |
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62) In an experiment studying photosynthesis performed during the day, you provide a plant with radioactive |
A) C4 plant. |
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63) Why are C4 plants able to photosynthesize with no apparent photorespiration? |
B) They use PEP carboxylase to initially fix CO2 |
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64) CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they |
A) fix CO2 into organic acids during the night |
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64) CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they |
A) fix CO2 into organic acids during the night. |
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65) Photorespiration lowers the efficiency of photosynthesis by preventing the formation of |
B) 3-phosphoglycerate molecules |
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66) The alternative pathways of photosynthesis using the C4 or CAM systems are said to be compromises. Why? |
C) Each one both minimizes photorespiration and optimizes the Calvin cycle. |
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67) If plant gene alterations cause the plants to be deficient in photorespiration, what would most probably occur? |
C) Less ATP would be generate |
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1) The light reactions of photosynthesis supply the Calvin cycle with |
D) ATP and NADPH. |
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2) Which of the following sequences correctly represents the flow of electrons during photosynthesis? |
B) H2O → NADPH → Calvin cycle |
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3) In mechanism, photophosphorylation is most similar to |
B) oxidative phosphorylation in cellular respiration. |
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4) How is photosynthesis similar in C4 and CAM plants? |
C) In both cases, rubisco is not used to fix carbon initially |
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5) Which process is most directly driven by light energy? |
D) removal of electrons from chlorophyll molecules |
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6) Which of the following statements is a correct distinction between autotrophs and heterotrophs? |
D) Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that |
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7) Which of the following does not occur during the Calvin cycle? |
C) release of oxygen |