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MCQs

Total Questions : 178 | Page 7 of 18 pages
Question 61. Rate of enzyme reaction depends on
  1.    pressure
  2.    temperature
  3.    wind
  4.    moisture in air
 Discuss Question
Answer: Option B. -> temperature
Answer: (b).temperature
Question 62. Special organic molecules called enzymes are the important content of
  1.    molecules
  2.    atom
  3.    cell
  4.    ion
 Discuss Question
Answer: Option C. -> cell
Answer: (c).cell
Question 63. Energy released during respiration is
  1.    less
  2.    greater
  3.    considerable
  4.    potent
 Discuss Question
Answer: Option A. -> less
Answer: (a).less
Question 64. Amylase enzyme shows maximum activity at a ph of about
  1.    7
  2.    4.5
  3.    4
  4.    7.6
 Discuss Question
Answer: Option A. -> 7
Answer: (a).7
Question 65. Enzymes which only speed up the reaction are regarded as
  1.    reversible
  2.    irreversible
  3.    compressional
  4.    non compressional
 Discuss Question
Answer: Option B. -> irreversible
Answer: (b).irreversible
Question 66. If concentration of an enzyme is increased by two fold, rate of reaction would be
  1.    half
  2.    double
  3.    triple
  4.    ceased
 Discuss Question
Answer: Option B. -> double
Answer: (b).double
Question 67. A co-factor and a polypeptide chain co-exist in an activated enzyme called as
  1.    co-factor
  2.    holoenzyme
  3.    apoenzyme
  4.    catalyst
 Discuss Question
Answer: Option B. -> holoenzyme
Answer: (b).holoenzyme
Question 68. Mechanism of enzyme activity is termed as
  1.    hydrolysis
  2.    catalysis
  3.    proteolysis
  4.    hydration
 Discuss Question
Answer: Option B. -> catalysis
Answer: (b).catalysis
Question 69. Chemical reactions are accelerated by
  1.    high concentration
  2.    high ph
  3.    high temperature
  4.    high density
 Discuss Question
Answer: Option C. -> high temperature
Answer: (c).high temperature
Question 70. For enzyme activity in human body, optimum temperature is
  1.    37c
  2.    34c
  3.    33c
  4.    32c
 Discuss Question
Answer: Option A. -> 37c
Answer: (a).37c

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