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MCQs

Total Questions : 66 | Page 4 of 7 pages
Question 31. _________ is a step-wise and geometric series of dilutions which starts with a small amount of starting material.
  1.    Simple dilution
  2.    Serial dilution
  3.    Continuous dilution
  4.    Chemical dilution
 Discuss Question
Answer: Option B. -> Serial dilution
Answer: (b).Serial dilution
Question 32. Bacteria is diluted in __________
  1.    Distilled water
  2.    Water
  3.    Culture media
  4.    Solution
 Discuss Question
Answer: Option C. -> Culture media
Answer: (c).Culture media
Question 33. Which of the following is commonly used?
  1.    Three – fold dilutions
  2.    Ten – fold dilutions
  3.    Five – fold dilutions
  4.    Six – fold dilutions
 Discuss Question
Answer: Option B. -> Ten – fold dilutions
Answer: (b).Ten – fold dilutions
Question 34. What is the minimum amount of sample required to perform serial dilution?
  1.    1 ml
  2.    5 ml
  3.    2 ml
  4.    2.5 ml
 Discuss Question
Answer: Option A. -> 1 ml
Answer: (a).1 ml
Question 35. A dilution is a process that increases the concentration of a substance in a solution.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 36. ___________ means that a substance can be converted into simpler compounds by biologically mediated reactions.
  1.    Non-biodegradable
  2.    Biodegradable
  3.    Dilution
  4.    Assimilation
 Discuss Question
Answer: Option B. -> Biodegradable
Answer: (b).Biodegradable
Question 37. What is endogenous respiration?
  1.    Discrete use of oxygen
  2.    Less use of oxygen
  3.    Higher amount of oxygen production
  4.    Continual use of oxygen
 Discuss Question
Answer: Option D. -> Continual use of oxygen
Answer: (d).Continual use of oxygen
Question 38. The rate at which oxygen is dissolved into the water from the atmosphere is proportional to the deficit of oxygen in the water.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 39. When the deoxygenation rate exceeds the reoxygenation rate, the oxygen sag curve shows ________ in a deficit of oxygen.
  1.    Increase
  2.    Decrease
  3.    Constant
  4.    Same
 Discuss Question
Answer: Option A. -> Increase
Answer: (a).Increase
Question 40. Oxygen in water is consumed during aerobic biodegradation of organic compounds.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True

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