E-PolyLearning

11. Which of the following can be used for the removal of color from the effluents of pulp mill?
a. Coriolus versicolor entrapped in calcium alginate beads
b. Phanerochaete chrysosporium
c. Both (a) and (b)
d. Nitrosomonas europaen
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Answer: (c).Both (a) and (b)

12. Which of the following have been used to oxidize ammonia and to prevent algal growth?
a. growth of hypomicrobium in presence of added methanol
b. Micrococcus denitrificans cells encapsulated in liquid membranes
c. Both (a) and (b)
d. Nitrosomonas europaen
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Answer: (d).Nitrosomonas europaen

13. Which of the following microorganisms leach metals out of rock ores and can accumulate silver?
a. Pseudomonas aeruginosa
b. Thiobacillus
c. Pseudomonas putida
d. Zoogloea ramigera
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Answer: (b).Thiobacillus

14. Inundation involves use of a/an
a. large number of organisms over a short time to suppress/destroy a population
b. organism over a short time to suppress/destroy a population
c. large number of organisms over a long time to suppress/destroy a population
d. organism over a long time to suppress/destroy a population
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Answer: (a).large number of organisms over a short time to suppress/destroy a population

15. Milbemycin is known to exhibit a broad spectrum of activity against
a. agricultural pests
b. agricultural herbs
c. agricultural insects
d. all of these
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Answer: (a).agricultural pests

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