bio exam 3

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bio exam 3
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2012-10-24 04:38:53
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exam 3
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  1.    
    Which of the following statements is true with respect to Figure 1?
    •  
    • Pepsin and pancreatic amylase could never function together in the same part of the body at the same time.
  2.  
    Enzymes increase the rate of a reaction by
    •    
    • decreasing the activation energy.
    •  
    • aligning the reactants in the transition state.
  3.  
    Some enzymes require the presence of an organic non-protein molecule in
    order to behave catalytically.  This
    organic non-protein molecule is called a(n):
    coenzyme
  4. .
    _______ Enzymes interact with specific substrates
    true
  5. Enzymes change shape after a reaction occurs
    false
  6. Enzymes speed up reactions
    true
  7. One enzyme can be used for many different types of chemical reactions.
    false
  8. Enzyme reactions can be slowed or halted using inhibitors.
    true
  9. .
    Raising the temperature towards the optimum temperature will ( increase /decrease / not change ) the rate of reaction.
    increase
  10. Boiling will ( increase / decrease / not change ) 
    the rate of reaction.
    decrease
  11. Changing the pH toward the optimal pH will ( increase / decrease / not change ) the rate
    of reaction.
    increase
  12. Introducing a competitive inhibitor will ( increase / decrease / not change ) the rate of
    reaction.
    decrease
  13. What is the major pigment involved in
    photosynthesis?  
    chlorophll
  14. Where in the plant is this pigment located?  


     

     

     

     

    5)
    What are the two stages of photosynthesis?
    thylakoid
  15. Most leaves look green when sunlight shines on them because… 
    chlorophyll relects green
  16. What are the two stages of photosynthesis?
    light independent and light dependent
  17. Then entire process of photosynthesis occurs in one organelle—name that organelle!

     
    Chloroplasts
  18. The oxygen released in photosynthesis comes from
    water
  19. What accumulates inside the thylakoid and then flows
    through ATP-synthase to power the production of ATP?
    • hydrogen
    • ions
  20. The electrons that are passed to NADP+ during light-dependent reaction were obtained from
    chlorophyll
  21. Which of the following is most descriptive of an electron transfer chain?
    It transfers energy in a stepwise manner from one compound to another.
  22. What is the carbon source for photosynthesis?
    carbon dioxide
  23. What cyclical metabolic pathway in photosynthesis uses this carbon source?
    carbon benson
  24. What molecule is made with the carbons?
    glucose
  25. When NAD+ combines with hydrogen and an electron, the NAD+ becomes
    reduced
  26. The light-independent reactions of photosynthesis:
    CHOOSE ALL CORRECT ANSWERS
    • fix carbon dioxide into a stable organic compound.
    • produce glucose which is most commonly
    • stored as starch or sucrose 
  27. Photosynthesis occurs entirely in the 
    choroplast
  28. The two halves of photosynthesis are the 
    light dependent/light independent
  29. The light dependant reactions occur in  the_______________ while the light independent reactions occur in the __________________.

     
    • The light dependant reactions occur in the _____thylakoid__________ while
    • the light independent reactions occur in the ___stroma_______________.

     
  30. The reactants and energy sources of the light dependant
    reactions are 
    ADP,NAPD,WATER, SUNLIGHT
  31. The products of the light dependant reactions
    are
    ATP, NHPD, GAS
  32. Photolysis is the process of splitting ____________ to gain
    electrons for the _____________ electron flow, which produces ____________ gas.
    WATER, noncyclic, OXYGEN
  33. The _________ and ___________ (energy carriers  from the light dependant reactions in the
    thylakoids) are then used by the ______________________ reactions, also called
    the _____________________ cycle.
    ATP, NADPH , LIGHT INDENDENT, CARBON BENSON
  34. The reactants of the light independent reactions are
    _________________ from the air, and ______________, ____________, the energy
    carriers from the light dependant rxns.
    • The reactants of the light independent reactions are
    • __CO2_______________ from the air, and __ATP____________, ___NADPH_________, the energy
    • carriers from the light dependant rxns.
  35. The products of the light independent reactions are
    _______________ and the low energy forms of the energy carriers _______ and
    __________, which will return to the __________________ to become energized
    again by the light dependant reactions.
    • The products of the light independent reactions are
    • ___GLUCOSE____________ and the low energy forms of the energy carriers _ADP______ and
    • __________, which will return to the __THYLAKOID________________ to become energized
    • again by the light dependant reactions.

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