Metabolism And Enzymes Trivia Questions! Biology Quiz

30 Questions | Total Attempts: 346

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Metabolism And Enzymes Trivia Questions! Biology Quiz

There are a lot of processes that take place in living things, and these processes take place at a low or increased rate. For metabolism to take place, there have to be some enzymes involved. Take up the quiz below and get to see just how much you know about the connection between metabolism and enzymes from your biology class.


Questions and Answers
  • 1. 
    Which of the following describe(s) some aspect of metabolism?
    • A. 

      Synthesis of macromolecules

    • B. 

      Breakdown of macromolecules

    • C. 

      Control of enzyme activity

    • D. 

      A and B only

    • E. 

      A, B, and C

  • 2. 
    Which term most precisely describes the cellular process of breaking down larege molecules into smaller ones?
    • A. 

      Catalysis

    • B. 

      Metabolism

    • C. 

      Anabolism

    • D. 

      Dehydration

    • E. 

      Catabolism

  • 3. 
    Which of the following statements correctly describe(s) catabolic pathways?
    • A. 

      They do not depend on enzymes.

    • B. 

      They consume energy to build up polymers from monomers.

    • C. 

      They release energy as they degrade polymers to monomers.

    • D. 

      They lead to the synthesis of catabolic pathways.

    • E. 

      Both A and B

  • 4. 
    Which of the following is a statement of the first law of thermodynamics?
    • A. 

      Energy cannot be created or destroyed.

    • B. 

      The entropy of the universe is decreasing.

    • C. 

      The entropy of the universe is constant.

    • D. 

      Kinetic energy is stored energy that results from the specific arrangement of matter.

    • E. 

      Energy cannot be transferred or transformed.

  • 5. 
    Whenever energy is transformed, there is always an increase in the
    • A. 

      Free energy of the system.

    • B. 

      Free energy of the universe.

    • C. 

      Entropy of the system.

    • D. 

      Entropy of the universe.

    • E. 

      Enthalpy of the universe.

  • 6. 
    Which of the following forms of energy is least available to accomplish cellular work?
    • A. 

      Light energy

    • B. 

      Electrical energy

    • C. 

      Thermal energy (heat)

    • D. 

      Mechanical energy

    • E. 

      Potential energy

  • 7. 
    What is the change in free energy of a system at chemical equilibrium?
    • A. 

      Slightly increasing

    • B. 

      Greatly increasing

    • C. 

      Slightly decreasing

    • D. 

      Greatly decreasing

    • E. 

      No net change

  • 8. 
    A chemical reaction that has a positive ΔG is correctly described as
    • A. 

      Endergonic.

    • B. 

      Endothermic.

    • C. 

      Enthalpic.

    • D. 

      Spontaneous.

    • E. 

      Exothermic.

  • 9. 
    ATP generally energizes a cellular process by
    • A. 

      Releasing heat upon hydrolysis.

    • B. 

      Acting as a catalyst.

    • C. 

      Coupling free energy released by ATP hydrolosis to free energy needed by other reactions.

    • D. 

      Breaking a high-energy bond.

    • E. 

      Binding directly to the substrate(s) of the enzyme.

  • 10. 
    • A. 

      Feedback regulation

    • B. 

      Bioenergetics

    • C. 

      Energy coupling

    • D. 

      Entropy

    • E. 

      Cooperativity

  • 11. 
    Sucrose is a disaccharide, composed of the monosaccharides glucose and fructose. The hydrolosys of sucrose by the enzyme sucrase results in
    • A. 

      Bringing glucose and fructose together to form sucrose.

    • B. 

      The release of water from sucrose as the bond between glucose and fructose is broken.

    • C. 

      Breaking the bond between glucose and fructose and forming new bonds from the atoms of water.

    • D. 

      Production of water from the sugar as bonds are broken between the glucose monomers.

    • E. 

      Utilization of water as a covalent bond is formed between glucose and fructose to form sucrase.

  • 12. 
    Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier known as the reaction's
    • A. 

      Entropy.

    • B. 

      Activation energy.

    • C. 

      Endothermic level.

    • D. 

      Heat content.

    • E. 

      Free-energy content.

  • 13. 
    Which of the following statements regarding enzymes is true?
    • A. 

      Enzymes decrease the free energy change of a reaction.

    • B. 

      Enzymes increase the rate of a reaction.

    • C. 

      Enzymes change the direction of chemical reactions.

    • D. 

      Enzymes are permanently altered by the reactions they catalyze.

    • E. 

      Enzymes prevent changes in substrate concentrations.

  • 14. 
    An enzyme catalyzes a reaction by
    • A. 

      Supplying the energy needed to speed up a reaction.

    • B. 

      Lowering the energy of activation of a reaction.

    • C. 

      Lowering the ΔG of a reaction.

    • D. 

      Changing the equilibrium of a spontaneous reaction.

    • E. 

      Increasing the amount of free energy of a reaction.

  • 15. 
    The active site of an enzyme is the region that
    • A. 

      Binds allosteric regulators of the enzyme.

    • B. 

      Is involved in the catalytic reaction of the enzyme.

    • C. 

      Binds the products of the catalytic reaction.

    • D. 

      Is inhibited by the presence of a coenzyme or a cofactor.

    • E. 

      Both A and B

  • 16. 
    Many different things can alter enzyme activity. Which of the following underlie all types of enzyme regulation?
    • A. 

      Changes in the activation energy of the reaction

    • B. 

      Changes in the active site of the enzyme

    • C. 

      Changes in the free energy of the reaction

    • D. 

      A and B only

    • E. 

      A, B, and C

  • 17. 
    Which curve was most likely generated from analysis of an enzyme from a human stomach where conditions are strongly acid?
    • A. 

      Curve 1

    • B. 

      Curve 2

    • C. 

      Curve 3

    • D. 

      Curve 4

    • E. 

      Curve 5

  • 18. 
    Which curve was most likely generated from an enzyme that requires a cofactor?
    • A. 

      Curve 1

    • B. 

      Curve 2

    • C. 

      Curve 4

    • D. 

      Curve 5

    • E. 

      It is not possible to determine whether an enzyme requires a cofactor from these data.

  • 19. 
    What is a nonprotein "helper" of an enzyme molecule called?
    • A. 

      Accessory enzyme

    • B. 

      Allosteric group

    • C. 

      Coenzyme

    • D. 

      Functional group

    • E. 

      Enzyme activator

  • 20. 
    Zinc, an essential trace element for most organisms, is present in the active site of the enzyme carboxypeptidase. The zinc most likely functions as a(n)
    • A. 

      Competitive inhibitor of the enzyme.

    • B. 

      Noncompetitive inhibitor of the enzyme.

    • C. 

      Allosteric activator of the enzyme.

    • D. 

      Cofactor necessary for enzyme activity.

    • E. 

      Coenzyme derived from a vitamin.

  • 21. 
    Which of the following terms best describes the reaction?
    • A. 

      Endergonic

    • B. 

      Exergonic

    • C. 

      Anabolic

    • D. 

      Allosteric

    • E. 

      Nonspontaneous

  • 22. 
    Which of the following would be the same in an enzyme-catalyzed or noncatalyzed reaction?
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

    • E. 

      E

  • 23. 
    A series of enzymes catalyze the reaction X→Y→Z→A Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme.What is substance X?
    • A. 

      A coenzyme

    • B. 

      An allosteric inhibitor

    • C. 

      A substrate

    • D. 

      An intermediate

    • E. 

      The product

  • 24. 
    A series of enzymes catalyze the reaction X→Y→Z→A Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme. Substance A functions as
    • A. 

      A coenzyme.

    • B. 

      An allosteric inhibitor.

    • C. 

      The substrate.

    • D. 

      An intermediate.

    • E. 

      A competitive inhibitor.

  • 25. 
    If an enzyme is added to a solution where its substrates and products are in equilibrium, what would occur?
    • A. 

      Additional product would be formed.

    • B. 

      Additional substrate would be formed.

    • C. 

      The reaction would change from endergonic to exergonic.

    • D. 

      The free energy of the system would change.

    • E. 

      Nothing; the reaction would stay at equilibrium.