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MCQs

Total Questions : 137 | Page 9 of 14 pages
Question 81. Enzymes are
  1.    organic compounds produced by living organism
  2.    inorganic compounds
  3.    organic as well as inorganic compounds
  4.    all of these
 Discuss Question
Answer: Option A. -> organic compounds produced by living organism
Answer: (a).organic compounds produced by living organism
Question 82. Isozymes or iso enzymes are those enzyme which
  1.    have same structural forms
  2.    have different structural forms but identical catalytic properties
  3.    catalyses oxidation reactions
  4.    none of these
 Discuss Question
Answer: Option B. -> have different structural forms but identical catalytic properties
Answer: (b).have different structural forms but identical catalytic properties
Question 83. The cell mass can be measured optically by determining the amount of light scattered by a suspension of cells. The measurements are usually at a wavelength of
  1.    300-400nm
  2.    400-500nm
  3.    500-600nm
  4.    600-700nm
 Discuss Question
Answer: Option D. -> 600-700nm
Answer: (d).600-700nm
Question 84. Semi-solid media, prepared with agar at concentrations of 0.5% or less are useful for the cultivation of
  1.    Microaerophillic bacteria
  2.    Lactobacilli
  3.    E.coli
  4.    all of these
 Discuss Question
Answer: Option A. -> Microaerophillic bacteria
Answer: (a).Microaerophillic bacteria
Question 85. Which of the following is not an indirect method for the measurement of cell mass?
  1.    Nutrient composition
  2.    Cell dry weight
  3.    Viscosity
  4.    Heat evolution
 Discuss Question
Answer: Option B. -> Cell dry weight
Answer: (b).Cell dry weight
Question 86. The protoplast can be used to
  1.    modify genetic information
  2.    create plant hybrid
  3.    study plant viral infections
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 87. Callus cultures are amorphous cell aggregates arising from the unorganized growth of explants on an
  1.    liquid medium
  2.    solid nutrient medium
  3.    aseptic solid nutrient medium
  4.    solid or liquid medium
 Discuss Question
Answer: Option C. -> aseptic solid nutrient medium
Answer: (c).aseptic solid nutrient medium
Question 88. How many cells present per millilitre in a bacterial culture can make the culture turbid?
  1.    cell
  2.    000 cells
  3.    lakh cells
  4.    07-108 cells
 Discuss Question
Answer: Option D. -> 07-108 cells
Answer: (d).07-108 cells
Question 89. Which of the following is a direct measurement of growth?
  1.    Determination of nitrogen content
  2.    Turbidimetric methods
  3.    Determination of Dry weight of cells
  4.    Measurement of a specific chemical change produced on a constituent of the medium
 Discuss Question
Answer: Option C. -> Determination of Dry weight of cells
Answer: (c).Determination of Dry weight of cells
Question 90. Colony-forming units per ml is the unit of _____________
  1.    Microscopic count
  2.    Electronic enumeration
  3.    Plate count
  4.    Turbidimetric measurement
 Discuss Question
Answer: Option C. -> Plate count
Answer: (c).Plate count

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