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MCQs

Total Questions : 105 | Page 5 of 11 pages
Question 41. Enzymes are large molecules, generally made up of
  1.    carbohydrates (CₓH₂ₙOₙ)
  2.    proteins
  3.    vitamins
  4.    lipids
 Discuss Question
Answer: Option B. -> proteins
Answer: (b).proteins
Question 42. Buffer solution play an important role in industrial processes like
  1.    electroplating only
  2.    dye manufacture only
  3.    plastic manufacture
  4.    electroplating and dye manufacture
 Discuss Question
Answer: Option D. -> electroplating and dye manufacture
Answer: (d).electroplating and dye manufacture
Question 43. Acidic oxides (non-metal oxides) of sulfur (S₈) and nitrogen (N₂) can fall pH of rainwater to
  1.    4
  2.    6
  3.    1
  4.    5
 Discuss Question
Answer: Option A. -> 4
Answer: (a).4
Question 44. The enzymes in bacteria found in hot springs have an optimum temperature of
  1.    95 °C
  2.    70 °C
  3.    25 °C
  4.    55 °C
 Discuss Question
Answer: Option B. -> 70 °C
Answer: (b).70 °C
Question 45. Human enzymes start to denature at the temperature above
  1.    40 °C
  2.    65 °C
  3.    95 °C
  4.    15 °C
 Discuss Question
Answer: Option A. -> 40 °C
Answer: (a).40 °C
Question 46. The enzymatic activity takes place at
  1.    low temperature
  2.    high temperature
  3.    constant
  4.    zero
 Discuss Question
Answer: Option A. -> low temperature
Answer: (a).low temperature
Question 47. The enzymes are denatured due to huge changes in
  1.    pH only
  2.    temperature only
  3.    pressure
  4.    pH and temperature
 Discuss Question
Answer: Option D. -> pH and temperature
Answer: (d).pH and temperature
Question 48. The mechanism of a catalyst is termed as
  1.    catalysis
  2.    hydrolysis
  3.    proteolysis
  4.    ionic
 Discuss Question
Answer: Option A. -> catalysis
Answer: (a).catalysis
Question 49. Due to change in their shape, the enzymes no longer attach substrate leaving the enzyme as
  1.    active
  2.    denatured
  3.    destroyed
  4.    efficient
 Discuss Question
Answer: Option B. -> denatured
Answer: (b).denatured
Question 50. Enzymes are biological
  1.    substrate
  2.    catalysts
  3.    products
  4.    none of above
 Discuss Question
Answer: Option B. -> catalysts
Answer: (b).catalysts

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