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MCQs

Total Questions : 238 | Page 11 of 24 pages
Question 101. α-aminoadipate inhibits the growth if one of the following marker is present in the yeast. That is
  1.    His 3
  2.    Lys 2
  3.    Ura 3
  4.    Trp 1
 Discuss Question
Answer: Option B. -> Lys 2
Answer: (b).Lys 2
Question 102. When dissolved oxygen is lower than the critical concentration, viable cell concentration declines because of
  1.    incomplete glutamine oxidation
  2.    increase in specific lactate production from glucose
  3.    both (a) and (b)
  4.    accumulation of ammonia
 Discuss Question
Answer: Option C. -> both (a) and (b)
Answer: (c).both (a) and (b)
Question 103. According to Eagle, the growth of L-strain and Hela-strain cultures require to have mandatory presence of
  1.    6 amino acids
  2.    8 amino acids
  3.    10 amino acids
  4.    12 amino acids
 Discuss Question
Answer: Option D. -> 12 amino acids
Answer: (d).12 amino acids
Question 104. Excess CO2 suppress cell growth and productivity by
  1.    inhibiting respiration
  2.    altering intracellular pH by diffusing across cell membrane
  3.    both (a) and (b)
  4.    altering pH of the medium
 Discuss Question
Answer: Option C. -> both (a) and (b)
Answer: (c).both (a) and (b)
Question 105. Which of the following is incorrect?
  1.    Established cell lines (ECL) have short doubling time
  2.    ECL are invariably aneuploid
  3.    ECL grow in higher density
  4.    ECL do not show much evidence of spatial orientation
 Discuss Question
Answer: Option C. -> ECL grow in higher density
Answer: (c).ECL grow in higher density
Question 106. What is the effect of excess accumulation of metabolite products (lactate and ammonium) on cells?
  1.    They act as growth promoters
  2.    They act as growth inhibitors
  3.    Have no effect on cells
  4.    Lactate helps in the growth while ammonium inhibits the growth
 Discuss Question
Answer: Option D. -> Lactate helps in the growth while ammonium inhibits the growth
Answer: (d).Lactate helps in the growth while ammonium inhibits the growth
Question 107. During the growth of animal cells in culture, it is noticed that the cells do not look very healthy. After an investigation, this is found that there is a lot of lactic acid in the culture fluid. What is probably wrong with this culture?
  1.    Ethyl alcohol is being produced in excess
  2.    The cells have too much oxygen
  3.    Glycolysis is being inhibited
  4.    The cells do not have enough oxygen
 Discuss Question
Answer: Option D. -> The cells do not have enough oxygen
Answer: (d).The cells do not have enough oxygen
Question 108. The human fibroplast is a classical example of
  1.    stable primary cell lines
  2.    established cell lines
  3.    cell transformations
  4.    none of these
 Discuss Question
Answer: Option A. -> stable primary cell lines
Answer: (a).stable primary cell lines
Question 109. Range of optimum glutamine concentration present in the culture media is
  1.    1-2 mmol/litre
  2.    2-7 mmol/litre
  3.    7-15 mmol/litre
  4.    15 - 20 mmol/litre
 Discuss Question
Answer: Option B. -> 2-7 mmol/litre
Answer: (b).2-7 mmol/litre
Question 110. PH of culture medium is initially controlled by
  1.    presence of CO2
  2.    presence of bicarbonate buffer
  3.    addition of bases
  4.    none of these
 Discuss Question
Answer: Option B. -> presence of bicarbonate buffer
Answer: (b).presence of bicarbonate buffer

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