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Bio 110 Final: Chapter 6

Usuario eliminado 10 preguntas

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  1. 1Reactions that release free energy are
    1. Aexergonic
    2. Bspontaneous
    3. Cendergonic
    4. Dendothermic
    5. Eboth a and b
  2. 2Enzymes speed up reactions by
    1. Aproviding chemical energy to fuel a reaction
    2. Blowering the activation energy necessary to initiate the reaction
    3. Ccausing an endergonic reaction to become an exergonic reaction
    4. Dsubstituting one of the reactants necessary for the reaction
    5. Enone of the above
  3. 3For the idealized reaction aA + bB === cC + dD, suppose that the equilibrium constant Keq, is 0.01. If the starting concentration for A,B,C, and D are 1 M each, what would you predict will happen based on the value of Keq?
    1. AThe forward reaction is favored
    2. BThe reverse reaction is favored
    3. CThe forward reaction is fast
    4. DThe reverse reaction is fast
    5. EBoth b and d are correct
  4. 4Researchers analyzed a cell extract-- a mixture of molecules isolated from cells-- and studied a chemical reaction in which a carbohydrate was broken down into smaller molecules. When they added a protease to the cell extract, the discovered that the protease greatly inhibited the rate of the reaction. Based on this observation, you could conclude that the reaction is
    1. Aexergonic
    2. Bendergonic
    3. Ccatalyzed by an enzyme
    4. Dcatalyzed by a ribozyme
    5. EBoth b an dc are true of this reaction
  5. 5In biological systems, ATP functions by
    1. Aproviding the energy to drive endergonic reactions
    2. Bacting as an enzyme and lowering the activation energy of certain reactions
    3. Cadjusting the pH of solutions to maintain optimal conditions for enzyme activity
    4. Dregulating the speed at which endergonic reactions proceed
    5. Einteracting with enzymes as a cofactor to stimulate chemical reactions
  6. 6In a chemical reaction, NADH is converted to NAD+ plus H+. W easy that NADH has been
    1. Areduced
    2. Bphosphorylated
    3. Coxidized
    4. Ddecarboxylated
    5. Emethylated
  7. 7Currently, scientists are identifying proteins that use ATP as an energy source by
    1. Adetermining whether those proteins function in anabolic or catabolic reactions
    2. Bdetermine is the protein has a known ATP-binding site
    3. Cpredicting the free energy necessary for the protein to function
    4. Ddetermining if the protein has an ATP synthase subunit
    5. Eall of the above
  8. 8For a particular chemical reaction, an inhibitor raises the Km, but does not affect the Vmax. This inhibitor
    1. Ais a competitive inhibitor
    2. Bis a noncompetitive inhibitor
    3. Cbinds to the active site of the enzyme
    4. Dbinds to an allosteric site of the enzyme
    5. Eis a competitive inhibitor and binds to the active site of the enzyme
  9. 9Which of the following is (are) key benefits of catabolic reactions?
    1. ARecycling of organic building blocks
    2. BBreakdown of organic molecules to obtain energy
    3. CSynthesis of important polymers, such as polypeptides
    4. DAll of the above
    5. Ea and b only
  10. 10Autophagy provides a way for cells to
    1. Adegrade entire organelles and cycle their components
    2. Bcontrol the level of ATP
    3. Cengulf bacterial cells
    4. Dexport unwanted organelles out of the cell
    5. Einhibit the first enzyme in a metabolic pathway

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El usuario ha eliminado su información de asignaturas Test sobre Bio 110 Final: Chapter 6, creado por Usuario eliminado el 13/12/2017.
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