Environmental Protection – Section 1

1. 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

Correct Answer: B. Thiobacillus

2. Inundation involves the 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

Correct Answer: A. large number of organisms over a short time to suppress/destroy a population

3. Milbemycin is known to exhibit a broad spectrum of activity against

A. agricultural pests
B. agricultural herbs
C. agricultural insects
D. all of these

Correct Answer: A. agricultural pests

4. The rate of degradation and microbes resistance to toxic pollutants remain better when the

A. mixed cell population is used
B. individual cell is used
C. mixed cell population along with metals is used
D. individual cell along with metal is used

Correct Answer: A. mixed cell population is used

5. Which of the bacteria is considered for biological leaching?

A. T. thiooxidans
B. T. ferrooxidans
C. Ferrobacillus ferrooxidans
D. all of these

Correct Answer: D. all of these

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