Cellular Energetics Review Game Page 1 An exergonic (spontaneous) reaction is a chemical reaction that 1 A is common in anabolic pathways. B cannot occur outside of a living cell. C leads to a decrease in the entropy of the universe. D releases energy when proceeding in the forward direction. ATP serves as a common energy source for organisms because its energy can be easily transferred to do cellular work. In general, the hydrolysis of ATP drives cellular work by 2 A releasing heat. B acting as a catalyst. C lowering the free energy of the reaction. D releasing free energy that can be coupled to other reactions. Which of the following is NOT an example of the cellular work accomplished with the free energy derived from the hydrolysis of ATP? 3 A mechanical work, such as the beating of cilia B chemical work, such as the synthesis of a new protein C the production of heat, which raises the temperature of the cell D transport work, such as the active transport of an ion into a cell Most of the electron carriers (NADH and FADH2) that deliver electrons to the electron transport chain come from which of the following? 4 A glycolysis B the citric acid cycle C oxidative phosphorylation D substrate-level phosphorylation 10/27/2015 9:30:45 AM
Transcript
Cellular Energetics Review Game Page 1
An exergonic (spontaneous) reaction is a chemical reaction that1
A is common in anabolic pathways.B cannot occur outside of a living cell.C leads to a decrease in the entropy of the universe.D releases energy when proceeding in the forward direction.
ATP serves as a common energy source for organisms because its energy can be easilytransferred to do cellular work. In general, the hydrolysis of ATP drives cellular work by
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A releasing heat.B acting as a catalyst.C lowering the free energy of the reaction.D releasing free energy that can be coupled to other reactions.
Which of the following is NOT an example of the cellular work accomplished with the freeenergy derived from the hydrolysis of ATP?
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A mechanical work, such as the beating of ciliaB chemical work, such as the synthesis of a new proteinC the production of heat, which raises the temperature of the cellD transport work, such as the active transport of an ion into a cell
Most of the electron carriers (NADH and FADH2) that deliver electrons to the electrontransport chain come from which of the following?
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A glycolysisB the citric acid cycleC oxidative phosphorylationD substrate-level phosphorylation
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Cellular Energetics Review Game Page 2
In the overall process of glycolysis and cellular respiration, _____ is oxidized and _____ isreduced.
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A ATP ... oxygenB glucose ... ATPC glucose ... oxygenD carbon dioxide ... water
During aerobic respiration, molecular oxygen (O2) is used for which of the followingpurposes?
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A at the end of glycolysis to oxidize pyruvateB as a source of O2 in every reaction that produces CO2C at the end of the citric acid cycle to regenerate citric acidD at the end of the electron transport chain to accept electrons and form H2O
In an experiment, mice were fed glucose (C6H12O6) containing a small amount ofradioactive carbon (carbon-14). The mice were closely monitored, and in a few minutesradioactive carbon atoms showed up in which compound?
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A ATPB waterC oxygen gasD carbon dioxide
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Cellular Energetics Review Game Page 3
If muscle cells in the human body consume O2 faster than it can be supplied, the cells willnot be able to carry out oxidative phosphorylation and switch to fermentation.Fermentation is essentially glycolysis plus an extra step in which pyruvate is reduced byelectrons from NADH to form lactate or alcohol and carbon dioxide. This last step
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A enables the cell to recycle NAD+.B prevents pyruvate from accumulating.C extracts a bit more energy from glucose.D enables the cell to make pyruvate into substances it can use.
How many molecules of ATP are gained by substrate-level phosphorylation from thecomplete breakdown of a single molecule of glucose in the presence of oxygen?
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A chemist has discovered a drug that blocks phosphoglucoisomerase, an enzyme thatcatalyzes the second reaction in glycolysis. He wants to use the drug to kill bacteria inpeople with infections. This is a bad idea because
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A glycolysis can occur without the action of enzymes.B glycolysis produces so little ATP that the drug will have little effect.C bacteria are prokaryotes; they usually don't need to perform glycolysis.D human cells must also perform glycolysis; the drug might also kill humans.
In green plants, most of the ATP for synthesis of proteins, cytoplasmic streaming, andother cellular activities comes directly from
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A the Calvin cycle.B oxidative phosphorylation.C cyclic photophosphorylation.D noncyclic photophosphorylation.
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Cellular Energetics Review Game Page 4
Below is an absorption spectrum for an unknown pigment molecule. What color would thispigment appear to you?
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A violetB blueC greenD yellowE red
CAM plants differ from C3 and C4 plants in that CAM plants13
A open their stomata only at night.B initially fix carbon using PEP carboxylase.C are better adapted to cold, damp conditions.D keep their stomata only partially open during the day.
Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longerseparated from the stroma. This damage will have the most direct effect on which of thefollowing processes of the light reactions?
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A the synthesis of ATPB the splitting of waterC the reduction of NADP+D the flow of electrons from photosystem II to photosystem I
Which of the following processes could still occur in a chloroplast in the presence of aninhibitor that prevents H+ from passing through ATP synthase complexes?
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A the Calvin cycleB cyclic photophosphorylationC oxidation of NADPH in the stromaD generation of a "proton pressure" in the thylakoid space
In an experiment studying photosynthesis performed during the day, you provide a plantwith radioactive carbon (14C) dioxide as a metabolic tracer. The 14C is incorporated firstinto oxaloacetic acid (oxaloacetate). The plant is best characterized as a
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A C4 plant.B C3 plant.C CAM plant.D chemoautotroph.
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Cellular Energetics Review Game Page 5
Imagine you had a tiny pH probe that could measure the pH inside a living plant cell. Whatportion of an illuminated C3 plant cell would you expect to have the lowest pH?
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A nucleusB chloroplastsC thylakoid spacesD stroma of chloroplasts
Some photosynthetic organisms contain chloroplasts that lack photosystem II, yet are ableto survive. The best way to detect the lack of photosystem II in these organisms would be
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A to test for CO2 fixation in the dark.B to test for production of O2 in the light.C to test for production of either sucrose or starch.D to do experiments to generate an action spectrum.
Soybeans have been genetically modified so that they resist the effect of the herbicideglyphosate. This allows the soybeans to be cultivated without competition.
The graph shows the percent of dead cells in samples of wild type and genetically modifiedsoybean leaves at regular intervals after exposure to glyphosate. The values in the graphrepresent the sample mean ±2 SEM of three simultaneously-conducted experiments.
At what time (in hours) did the results of this investigation begin to show a statisticallysignificant difference?
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Cellular Energetics Review Game Page 6
The diagram below represents an experiment with isolated chloroplasts. The chloroplastswere first made acidic by soaking them in a solution at pH 4. After the thylakoid spacereached pH 4, the chloroplasts were transferred to a basic solution at pH 8. Thechloroplasts are then placed in the dark. Which of these compounds would you expect tobe produced?
