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BIOL- MB Exam 3

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
show Inner Membrane  
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show The difference in H+ concentrations on opposite sides of the inner mitochondrial membrane  
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Energy released by the electron transport chain is used to pump H+ ions into which location?   show
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The primary role of oxygen in cellular respiration is to   show
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Where are the proteins of the electron transport chain located?   show
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show Oxidation of pyruvate to acetyl CoA and the citric acid cycle  
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show 10  
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show Acetyl CoA  
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show NADH and pyruvate  
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The oxygen consumed during cellular respiration is involved directly in which process or event?   show
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show Cytosol  
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show C6H12O6 is oxidized and O2 is reduced  
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show Lactate- fermentation in human muscle Ethanol- fermentation in yeast and bacteria Acetyl CoA- Aerobic oxidation  
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show Reactants- Pyruvate + NADH Products- Lactate + NAD+  
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show 2  
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show 6  
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In cellular respiration, most ATP molecules are produced by ___.   show
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show Oxygen  
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show NADH and FADH2... intermembrane space  
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The proximate (immediate) source of energy for oxidative phosphorylation is___.   show
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show Net Inputs- Glucose, NAD+, ADP Net Outputs- ATP, Pyruvate, NADH Neither-CO2, Acetyl CoA, O2, CoA  
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From the following compounds involved in cellular respiration(Pyruvate, ADP, O2, NAD+, CoA, Glucose, acetyl CoA, NADH, CO2, ATP), choose those that are net inputs and net outputs of acetyl CoA formation.   show
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From the following compounds involved in cellular respiration (pyruvate, CO2, ADP, Glucose, NAD+, Acetyl CoA, NADH,ATP, O2, coenzyme A) , choose those that are the net inputs and net outputs of the citric acid cycle.   show
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From the following compounds involved in cellular respiration (ADP, acetyl CoA, pyruvate, NAD+, ATP, CO2, NADH, coenzyme A, O2, glucose), choose those that are the net inputs and net outputs of oxidative phosphorylation.   show
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Glycolysis takes place where in the cell?   show
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show Mitochondrial matrix  
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show Mitochondrial matrix  
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show inner mitochondrial membrane  
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When a compound donates (loses) electrons, that compound becomes ___. Such a compound is referred to as an electron donor.   show
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show Reduced  
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show Glucose  
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Once the electron donor in glycolysis gives up its electrons, it is oxidized to a compound called ___.   show
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show NAD+  
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show NADH  
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Among the products of glycolysis, which compounds contain energy that can be used by other biological reactions?   show
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This describes some aspect of substrate-level phosphorylation in glycolysis, One of the substrates in a molecule derived from the breakdown of glucose. True or False?   show
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show True  
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This describes some aspect of substrate-level phosphorylation in glycolysis, An enzyme is required in order for the reaction to occur. True or False?   show
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show False  
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show False  
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In mitochondrial electron transport, what is the direct role of O2?   show
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show Both electron transport and ATP synthesis would stop  
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Why is more ATP made per molecule of NADH than per molecule of FADH2?   show
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show Remains the Same- Electron transport rate, proton pumping rate, rate of oxygen uptake Decreases (Or goes to zero)- Rate of ATP synthesis, size of the proton gradient  
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Name the inputs and outputs of Glycolysis   show
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Name the inputs and outputs of Acetyl CoA Formation and the Citric Acid Cycle   show
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Name the inputs and outputs of Oxidative Phosphorylation   show
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show It is easier to remove electrons and produce CO2 from compounds with three or more carbon atoms than from a two-carbon compound such as acetyl CoA.  
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show In the absence of oxygen, electron transport stops. NADH is no longer converted to NAD+, which is needed for the first three stages of cellular respiration.  
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Suppose that a cell’s demand for ATP suddenly exceeds its supply of ATP from cellular respiration. Which statement correctly describes how this increased demand would lead to an increased rate of ATP production?   show
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Assume that a muscle cell’s demand for ATP under anaerobic conditions remains the same as it was under aerobic conditions. What would happen to the cell’s rate of glucose utilization?   show
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show 6 CO2 + 6 H2O → C6H12O6 + 6 O2  
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show Water.. NADPH  
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Choose whether the following are inputs, outputs, or neither from the light reactions. (Glucose, NADPH, NADP+,O2,G3P, ATP, Water, ADP, CO2, Light)   show
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From the following choices, identify those that are the inputs and outputs of the Calvin cycle. (ATP, NADPH, NADP+, Light, O2, CO2, ADP, G3P, Glucose)   show
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In the light reactions, light energy is used to oxidize ___ to ___.   show
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show NADP+... NADPH  
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The Calvin Cycle oxidizes the light-reactions product ____ to ____.   show
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show CO2... G3P  
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CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they...   show
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show They use PEP carboxylase to initially fix CO2  
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What is true of the enzyme ribulose bisphosphate carboxylase?   show
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show 6  
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Where do the enzymatic reactions of the Calvin cycle take place?   show
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Which of the following statements best describes the relationship between photosynthesis and respiration?   show
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show Thykaloid membrane and the inner mitochondrial membrane  
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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?   show
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show ATP  
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What are the products of noncyclic photophosphorylation?   show
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Is this true or false regarding the functioning of photosystem II? Light energy excites electrons in an antenna pigment in a photosynthetic unit.   show
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show True  
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show False  
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Is this true or false regarding the functioning of photosystem II? The electron vacancies in P680 are filled by electrons derived from water.   show
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show True  
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show This pigment is best at absorbing light with a wavelength of 700 nm.  
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In the thylakoid membranes, what is the main role of the antenna pigment molecules?   show
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A plant has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are not being absorbed by this pigment?   show
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show Photorespiration  
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In C4 and CAM plants carbon dioxide is fixed in the _____ of mesophyll cells.   show
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show transfer fixed carbon dioxide to cells in which the Calvin cycle occurs  
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show RuBP  
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After 3-PGA is phosphorylated, it is reduced by _____.   show
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show 6  
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show 3  
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show The rate of O2 production would decrease because the rate of ADP and NADP+ production by the Calvin cycle would decrease.  
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