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MCQs

Total Questions : 127 | Page 8 of 13 pages
Question 71.  The cells dependent solely on glucose as an energy source are
  1.    muscle cells
  2.    brain cells
  3.    kidney cells
  4.    liver cells
 Discuss Question
Answer: Option B. -> brain cells
Question 72. . Which of the following statements about the energy needs of cells is false?
  1.    Without a continuous input of energy, cell disorder will increase
  2.    The laws of thermodynamics force cells to acquire energy
  3.    Many cellular reactions have an associated activation energy
  4.    The most usable energy for cells comes from the rapid combustion of glucose
 Discuss Question
Answer: Option D. -> The most usable energy for cells comes from the rapid combustion of glucose
Question 73. . In lysozyme catalysis, which of the following does not contribute?
  1.    The abnormally high pKa of Glu35
  2.    The strained conformation of the D sugar
  3.    Formation of a covalent intermediate at Asp52
  4.    Formation of a covalent intermediate at Ser195
 Discuss Question
Answer: Option D. -> Formation of a covalent intermediate at Ser195
Question 74. . Cellulose fibers resemble with the protein structure in the form of
  1.    β-sheets
  2.    α-helices
  3.    β-turns
  4.    None of these
 Discuss Question
Answer: Option A. -> β-sheets
Question 75. . During vigorous exercise, pyruvate produced by glycolysis is converted to
  1.    acetate
  2.    lactate
  3.    monosodium phosphate
  4.    pyruvic acid
 Discuss Question
Answer: Option B. -> lactate
Question 76. . Glucagon and epinephrine
  1.    inhibits gluconeogenesis and stimulates glycolysis
  2.    stimulates gluconeogenesis and glycolysis
  3.    stimulates gluconeogenesis and inhibits glycolysis
  4.    inhibits gluconeogenesis and glycolysis
 Discuss Question
Answer: Option C. -> stimulates gluconeogenesis and inhibits glycolysis
Question 77. . The NAG6 substrate is hydrolyzed by human lysozyme to form
  1.    6 glucosamines + 6 acetic acids
  2.    NAG4 + NAG2
  3.    NAG3 + NAG3
  4.    NAG3
 Discuss Question
Answer: Option B. -> NAG4 + NAG2
Question 78. . Gluconeogenesis uses
  1.    3 ATPs and 2 GTPs per glucose
  2.    2 ATPs and 1 GTPs per glucose
  3.    3 ATPs and 3 GTPs per glucose
  4.    4 ATPs and 2 GTPs per glucose
 Discuss Question
Answer: Option D. -> 4 ATPs and 2 GTPs per glucose
Question 79. . Saliva contains all of the following except
  1.    hormones
  2.    amylase
  3.    bacteria-killing enzymes
  4.    antibodies
 Discuss Question
Answer: Option A. -> hormones
Question 80. . The conversion of pyruvate to oxaloacetate
  1.    requires biotin
  2.    involves the fixation of carbon dioxide
  3.    occurs in the mitochondria
  4.    all of the above
 Discuss Question
Answer: Option A. -> requires biotin

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