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MCQs

Total Questions : 186 | Page 19 of 19 pages
Question 181. Denitrification is carried out
  1.    usually by facultative anaerobes
  2.    All of these
  3.    predominantly by Pseudomonas spp
  4.    predominantly by Bacillus spp
 Discuss Question
Answer: Option B. -> All of these
Question 182. The microbial ecosystem of soil includes
  1.    biotic and abiotic components of soil
  2.    None of these
  3.    biotic components of soil
  4.    abiotic components of soil
 Discuss Question
Answer: Option A. -> biotic and abiotic components of soil
Question 183. The energy value of biogas is typically
  1.    more than 5000 BTU/ft3
  2.    1,000 BTU/ft3
  3.    400-700 BTU/ft3
  4.    1500 BTU/ft3
 Discuss Question
Answer: Option C. -> 400-700 BTU/ft3
Question 184. Assimilative denitrification is done by
  1.    fungi
  2.    plants
  3.    all of these
  4.    prokaryotes
 Discuss Question
Answer: Option C. -> all of these
Question 185. Which of the following fungi on infecting crop roots can improve their uptake of phosphorus and other nutrients?
  1.    VA Mycorrhiza
  2.    Saccharomyces cerevisiae
  3.    Aspergillus niger
  4.    Candida torulopsis
 Discuss Question
Answer: Option A. -> VA Mycorrhiza
Question 186. Syntrophism involves
  1.    exchange of nutrients between two species
  2.    no exchange of nutrients among species
  3.    no exchange of nutrients between two species
  4.    exchange of nutrients among species
 Discuss Question
Answer: Option A. -> exchange of nutrients between two species

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