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MCQs

Total Questions : 195 | Page 3 of 20 pages
Question 21. The species of Acetobacter which produces cellulosic strands to hold the cells in lime layer is
  1.    Acetobacter curvum
  2.    Accetobacter orleanense
  3.    Acetobacter xylinum
  4.    Acetobacter schuetzenbachii
 Discuss Question
Answer: Option C. -> Acetobacter xylinum
Answer: (c).Acetobacter xylinum
Question 22. The commonly used media for submerged bacterial fermentation at commercial scale is
  1.    beet molasses
  2.    liver extract
  3.    germinated seed
  4.    none of these
 Discuss Question
Answer: Option A. -> beet molasses
Answer: (a).beet molasses
Question 23. The recovery of vitamin from fermentation broth is carried out prior to
  1.    acidification
  2.    alcohol treatment
  3.    autolysis
  4.    none of these
 Discuss Question
Answer: Option C. -> autolysis
Answer: (c).autolysis
Question 24. Naringinase, an enzyme commonly used for removal of bitter taste from citrus juice is obtained from
  1.    A. niger
  2.    A.flavus
  3.    A. oryzae
  4.    S. cerevisiae
 Discuss Question
Answer: Option A. -> A. niger
Answer: (a).A. niger
Question 25. Which of the following microorganism produces only L(+) - lactic acid without further racemization ?
  1.    Leuconostoc mesenteroides
  2.    Lactobacillus delbrueckii
  3.    Rhizopus oryzae
  4.    Lactobacillus bulgaricus
 Discuss Question
Answer: Option C. -> Rhizopus oryzae
Answer: (c).Rhizopus oryzae
Question 26. Glucoseoxidase, which had been commercially employed to remove glucose from egg white and whole eggs before drying is obtained by submerged aerated fermentation using
  1.    A. niger
  2.    B. subtilis
  3.    B. cereus
  4.    A.flavus
 Discuss Question
Answer: Option A. -> A. niger
Answer: (a).A. niger
Question 27. The micro-organism used for industrial production of lactic acid using corn dextrose as media is
  1.    Lactobacillus bulgaricus
  2.    Lactobacillus delbrueckii
  3.    Lactobacillus pentosus
  4.    Streptococcus lactis
 Discuss Question
Answer: Option B. -> Lactobacillus delbrueckii
Answer: (b).Lactobacillus delbrueckii
Question 28. Which of the following microorganism can yield vitamin B12 using methanol as a carbon source?
  1.    Methanobacterium soehngenii
  2.    Methanobacillus omelianski
  3.    Protaminobacter ruber
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Answer: (d).All of the above
Question 29. The immediate precursor for glumatic acid production by Corynebacterium glutamicum is
  1.    lysine
  2.    oxoacetate
  3.    citrate
  4.    2-oxo-glutarate
 Discuss Question
Answer: Option D. -> 2-oxo-glutarate
Answer: (d).2-oxo-glutarate
Question 30. The method of distillation used to obtain alcohol greater than 95 percent is called
  1.    fractional distillation
  2.    flash evaporation
  3.    azeotropic distillation
  4.    successive distillation
 Discuss Question
Answer: Option C. -> azeotropic distillation
Answer: (c).azeotropic distillation

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