Trivia Questions Quiz On Energy, Enzymes And Catalyzed Reactions!

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Trivia Questions Quiz On Energy, Enzymes And Catalyzed Reactions!

Are you looking for Trivia Questions Quiz on Energy, Enzymes, and Catalyzed Reactions? In most reactions,’ energy is released, and it increases when a catalyst is introduced. The quiz below is perfect for helping you review what you learned about this in chemistry class. Do give it a try, and be sure to look out for other quizzes like it!


Questions and Answers
  • 1. 
    Catabolic pathways:
    • A. 

      Build molecules

    • B. 

      Break molecules

    • C. 

      Are exothermic

    • D. 

      Are endothermic

    • E. 

      Have a -delta G

    • F. 

      Have a +delta G

  • 2. 
    The first law of thermodynamics states:
    • A. 

      Energy is spontaneously created in exothermic reactions

    • B. 

      Energy is transferred to the universe in entropy

    • C. 

      Energy cannot be created or distroyed, only transferred or transformed

    • D. 

      Potential energy is the capacity to cause change

  • 3. 
    Free energy is
    • A. 

      A system's energy available to perform work under constant temperature and pressure

    • B. 

      Zero in open systems

    • C. 

      Is positive in spontaneous reactions

    • D. 

      Promotes disequailibrium in closed systems

  • 4. 
    ATP is hydrolyzed to ADP by transferring a phosphate group to a less reactive molecule, releasing 7.3 kcal of energy for each mole of ATP.
    • A. 

      True

    • B. 

      False

  • 5. 
    How do enzymes speed up the rate of reactions?
    • A. 

      By irreversibly binding to a substrate

    • B. 

      By changing the free energy for a reaction

    • C. 

      By reducing the amount of ATP needed in catabolic pathways

    • D. 

      By lowering activation energy, and making the reactants reach an unstable transition state

  • 6. 
    What factors impact enzyme catalyzed reactions?
    • A. 

      Concentration of enzyme, up to the point of saturating the substrate

    • B. 

      The presence of cofactors

    • C. 

      Optimal pH and temperature

    • D. 

      The presence of inhibitors

  • 7. 
    What is allosteric regulation?
    • A. 

      The R group of an amino acid binds with the active site to control enzyme inhibition.

    • B. 

      The binding of activators and inhibitors to different active sites to either stabilize the active or inactive form of an enzyme.

    • C. 

      The induced-fit binding of a substrate to one subunit, changing the shape of all active sites to decrease activity.

    • D. 

      The disruption of the action of enzymes through enzyme inhibitions

  • 8. 
    The product of a pathway acts as an allosteric inhibitor of an enzyme early in the pathway
    • A. 

      True

    • B. 

      False

  • 9. 
    Which of the following is mismatched with its location?
    • A. 

      Light reaction - grana

    • B. 

      Electron transport chain - thylakoid membrane

    • C. 

      Calvin cycle - stroma

    • D. 

      ATP synthase - doulbe membrane surrounding chloroplast

    • E. 

      Splitting of water - thylakoid space

  • 10. 
    Photosynthesis is a redox process in which
    • A. 

      Carbon dioxide is reduced

    • B. 

      NADP+ is reduced

    • C. 

      RuBP is oxidized

    • D. 

      Water is oxidized

    • E. 

      Oxygen as an an oxidizing agent

  • 11. 
    Accessory pigments in the chloroplast are responsible for
    • A. 

      Driving the splitting of water molecules

    • B. 

      Absorbing photons of different wavelengths of light & passing that energy to P680 & P700

    • C. 

      Providing electrons to the reaction-center chlorophyll after photoexcited electrons pass to NADP+

    • D. 

      Pumping H+ across the thylakoid membrane to create a proton-motive force

    • E. 

      Anchoring chlorophyll a withinin the reaction center

  • 12. 
    CAM plants separate carbon fixation from the Calvin cycle by opening stomata at night to take up carbon dioxide to make organic acids, which will be broken down during the day to release carbon dioxide for the Calvin cycle.
    • A. 

      True

    • B. 

      False

  • 13. 
    Six molecules of G3P formed from the fixation of 3 carbon dioxide molecules in the Calvin cycle are used to produce
    • A. 

      Three molecules of glucose

    • B. 

      Three molecules of RuBP and on G3P

    • C. 

      One molecule of glucose and four molecules of G3P

    • D. 

      Non of the above, since three molecules of G3P result from three turns of the Calvin cycle

  • 14. 
    What does Rubisco do?
    • A. 

      Reduces carbon dioxide to G3P

    • B. 

      Regenerates RuBP with the aid of ATP

    • C. 

      Combines electrons & H+ to reduce NADP+ to NADPH

    • D. 

      Adds carbon dioxide to RuBp in the carbon fixation stage

    • E. 

      Transfers electrons from NADPH to 1.3-biphospoglycerate to produce G3P

  • 15. 
    How does cyclic electron flow differ from linear (non-cyclic) electron flow in the light reactions?
    • A. 

      No NADPH is produced by cyclic

    • B. 

      No oxygen is produced by cyclic

    • C. 

      The cytochrome complex in the electron transport chain is not involved in cyclic

    • D. 

      Both a & b are correct

    • E. 

      A, b & c are correct

  • 16. 
    How many turns of the Calvin cycle are needed to make one glucose?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      6

  • 17. 
    The Calvin cycle requires the input of
    • A. 

      ATP

    • B. 

      NADPH

    • C. 

      Carbon dioxide

    • D. 

      G3P

    • E. 

      RuBP

  • 18. 
    The reactants of photosynthesis are
    • A. 

      Oxygen

    • B. 

      Carbon dioxide

    • C. 

      Water

    • D. 

      ATP

    • E. 

      NADPH

    • F. 

      Glucose

    • G. 

      Sunlight

  • 19. 
    Photosystem II differs from photosystem I in that it
    • A. 

      Used P680 chlorophyll a

    • B. 

      Uses electrons to power the reaction center

    • C. 

      Functions in cyclic electron flow

    • D. 

      Is not used in cyclic electron flow

    • E. 

      Both a & d

  • 20. 
    The light reaction occurs in the thylakoid and the dark reaction occurs in the stroma
    • A. 

      True

    • B. 

      False