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MCQs

Total Questions : 116 | Page 7 of 12 pages
Question 61.  Pectinase, an enzyme used for increasing yield and for clarifying juice is obtained by
  1.    A. oryzae
  2.    A. niger
  3.    A.flavus
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 62.  
Which of the following when used in proper concentration stimulates the Ascomycetes fermentation of vitamin B12 and can be used to counteract toxicity of iron in Candida species?
  1.    Co
  2.    Ni
  3.    Zn
  4.    Ca
 Discuss Question
Answer: Option A. -> Co
Question 63.  The 95% ethanol is equivalent to
  1.    190 proof
  2.    110 proof
  3.    170 proof
  4.    120 proof
 Discuss Question
Answer: Option A. -> 190 proof
Question 64.  Which species from the followings is resistant to methyl tryptophan?
  1.    Candida utilis
  2.    E. coli
  3.    subtilis
  4.    Hansenula anomala
 Discuss Question
Answer: Option C. -> subtilis
Question 65. . Which of the following substance is employed to neutralize the lactic acid as it is produced (because lactic acid bacteria do not tolerate high concentrations of acid?
  1.    CaCO3
  2.    (NH4)2 HPO4
  3.    MgSO4
  4.    Na2SO4
 Discuss Question
Answer: Option A. -> CaCO3
Question 66. . Which of the following organism produces enzyme taka diastase?
  1.    A. oryzae
  2.    B. subtilis
  3.    A. niger
  4.    S. cerevisiae
 Discuss Question
Answer: Option A. -> A. oryzae
Question 67. . Alcohol production from starch and raw sugar utilizes selected strains of
  1.    Saccharomyces cerevisiae
  2.    Candida pseudotropicalis
  3.    Candida utilis
  4.    none of these
 Discuss Question
Answer: Option A. -> Saccharomyces cerevisiae
Question 68. . Why high concentration of sugars are not employed in the fermentation medium?
  1.    Calcium lactate is not produced
  2.    Calcium lactate crystallizes from the medium and slows down the process of fermentation
  3.    High sugar concentration itself crystallizes
  4.    None of the above
 Discuss Question
Answer: Option B. -> Calcium lactate crystallizes from the medium and slows down the process of fermentation
Question 69. . Uungal amylases using stationary culture with wheat bran utilizes
  1.    A. oryzae
  2.    A. niger
  3.    A. flavus
  4.    S. cerevisiae
 Discuss Question
Answer: Option A. -> A. oryzae
Question 70. . Which of the following is not an industrial product made by the fungus Aspergillus niger?
  1.    Galactosidase
  2.    Citric acid
  3.    Gluconic acid
  4.    Lysine
 Discuss Question
Answer: Option D. -> Lysine

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