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MCQs

Total Questions : 186 | Page 4 of 19 pages
Question 31. Which are the main source of biofertilisers?
  1.    Cyanobacteria
  2.    Bacillus
  3.    Streptococcus
  4.    None of these
 Discuss Question
Answer: Option A. -> Cyanobacteria
Answer: (a).Cyanobacteria
Question 32. The organisms responsible for the characteristic musty or earth odor of a freshly plowed field is/are
  1.    Nocardia
  2.    Streptomyces
  3.    Micromonospora
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 33. Denitrification is
  1.    reduction of nitrate (NO3-) to nitrogen gas
  2.    reduction of nitrate to organic nitrogen compounds
  3.    both (a) and (b)
  4.    changing of atmospheric nitrogen (N2) to nitrogen compounds
 Discuss Question
Answer: Option C. -> both (a) and (b)
Answer: (c).both (a) and (b)
Question 34. Degree of compost maturity can be assesed by
  1.    infrared technique
  2.    germination test
  3.    both (a) and (b)
  4.    none of the above
 Discuss Question
Answer: Option C. -> both (a) and (b)
Answer: (c).both (a) and (b)
Question 35. The energy value of biogas is typically
  1.    400-700 BTU/ft3
  2.    1,000 BTU/ft3
  3.    1500 BTU/ft3
  4.    more than 5000 BTU/ft3
 Discuss Question
Answer: Option A. -> 400-700 BTU/ft3
Answer: (a).400-700 BTU/ft3
Question 36. Syntrophism involves
  1.    exchange of nutrients between two species
  2.    exchange of nutrients among species
  3.    no exchange of nutrients between two species
  4.    no exchange of nutrients among species
 Discuss Question
Answer: Option A. -> exchange of nutrients between two species
Answer: (a).exchange of nutrients between two species
Question 37. In chilled shrimp __________ is chiefly responsible for spoilage.
  1.    Achromobacter
  2.    Pseudomonas
  3.    Micrococcus or Bacillus species
  4.    Molds or yeasts
 Discuss Question
Answer: Option A. -> Achromobacter
Answer: (a).Achromobacter
Question 38. A musty or muddy odor of the fish is attributed to
  1.    the growth of Streptomyces species in the mud at the bottom of the body of water
  2.    the mud at the bottom of the body of water
  3.    the growth of Pseudomonas species in the mud at the bottom of the body of water
  4.    none of the above
 Discuss Question
Answer: Option A. -> the growth of Streptomyces species in the mud at the bottom of the body of water
Answer: (a).the growth of Streptomyces species in the mud at the bottom of the body of water
Question 39. Assimilative denitrification is done by
  1.    plants
  2.    fungi
  3.    prokaryotes
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 40. The chief spoilage organisms on smoked fish are
  1.    molds
  2.    bacteria
  3.    both (a) and (b)
  4.    fungi
 Discuss Question
Answer: Option A. -> molds
Answer: (a).molds

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