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MCQs

Total Questions : 48 | Page 3 of 5 pages
Question 21. The ability of CTP to bind to aspartate carbamoyltransferase and shut down the synthesis of more CTP is an example of
  1.    none of these
  2.    enzyme induction
  3.    feedback inhibition of enzyme activity
  4.    enzyme repression
 Discuss Question
Answer: Option C. -> feedback inhibition of enzyme activity
Question 22. Oxidation is the
  1.    loss of proton
  2.    gain of protons
  3.    gain of electron
  4.    loss of electron
 Discuss Question
Answer: Option D. -> loss of electron
Question 23. Denaturation of an enzyme refers to the
  1.    formation of the enzymes proper shape
  2.    improper arrangement of the enzyme in a metabolic pathway
  3.    formation of a new isozyme for that enzyme
  4.    loss of the enzymes proper shape
 Discuss Question
Answer: Option D. -> loss of the enzymes proper shape
Question 24.  
The ability of a competitive inhibitor to bind to an active site in an allosterically controlled enzyme is __________ than the ability of a non-competitive inhibitor to bind to an active site in the same allosterically controlled enzyme.
  1.    greater
  2.    lesser
  3.    approximately equal
  4.    half
 Discuss Question
Answer: Option A. -> greater
Question 25.  The ability of Vibrio fischeri to convert chemical energy directly into radiant energy in bioluminescence is an example of __________ at work.
  1.    Shelford's law of tolerance
  2.    Leibig's law of the minimum
  3.    the first law of thermodynamics
  4.    the third law of thermodynamics
 Discuss Question
Answer: Option C. -> the first law of thermodynamics
Question 26.  Reduction is the
  1.    loss of proton
  2.    gain of electron
  3.    loss of electron
  4.    gain of protons
 Discuss Question
Answer: Option B. -> gain of electron
Question 27.  The ability of FADH to be oxidized is __________ than the ability of FAD to be oxidized.
  1.    greater
  2.    lesser
  3.    approximately equal
  4.    half
 Discuss Question
Answer: Option A. -> greater
Question 28.  An endergonic reaction is one that
  1.    requires energy in order to proceed
  2.    releases energy for work
  3.    gives off much heat
  4.    looses energy
 Discuss Question
Answer: Option A. -> requires energy in order to proceed
Question 29.  An exergonic reaction is one that
  1.    requires energy to proceed
  2.    releases energy for work
  3.    gives off much heat
  4.    looses energy
 Discuss Question
Answer: Option B. -> releases energy for work
Question 30.  
If the Keq for an enzymatic reaction is greater than 1, the reaction
  1.    will be endergonic
  2.    can not occur without the input of energy
  3.    both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option D. -> none of these

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