Microbes in Aquatic Environment problems
- 1. Because it can be used with a variety of media and allow a resuscitation step the __________ technique has become the common and often preferred method of evaluating the microbiological characteristics of water.
Options- A. most probable number
- B. Winogradsky
- C. MUG
- D. membrane filtration Discuss
Correct Answer: membrane filtration
- 2. The amount of oxygen dissolved in hypolimnion water in the winter is __________ to/than the amount of oxygen dissolved in hypolimnion water in the summer
Options- A. greater
- B. lesser
- C. approximately equal to
- D. half Discuss
Correct Answer: greater
- 3. Trickling filter comes under
Options- A. primary treatment
- B. secondary treatment
- C. tertiary treatment
- D. none of these Discuss
Correct Answer: secondary treatment
- 4. Removal of solids is generally considered as a
Options- A. Primary treatment
- B. Secondary treatment
- C. Tertiary treatment
- D. None of these Discuss
Correct Answer: Primary treatment
- 5. Activated sludge undergoes
Options- A. Primary treatment
- B. Secondary treatment
- C. Tertiary treatment
- D. any of these Discuss
Correct Answer: Secondary treatment
- 6. Metabolism of dissolved organic material released by phytoplankton allows heterotrophic bacteria to become part of the particulate organic matter that is passed up the food web to be metabolized and released as mineral elements and CO2 at each transfer. This sentence describes the
Options- A. microbial loop
- B. Winogradsky column
- C. Redfield ratio
- D. Gibbs free energy Discuss
Correct Answer: microbial loop
- 7. Chemical precipitation of phosphorus is
Options- A. primary treatment
- B. secondary treatment
- C. tertiary treatment
- D. both (a) and (b) Discuss
Correct Answer: tertiary treatment
- 8. Which of the following is correct?
Options- A. All members of Hyphomycetes are also members of Fungi, but not all members of Fungi are members of Hyphomycetes
- B. All members of Fungi are also members of Hyphomycetes, but not all members of Hyphomycetes are members of Fungi
- C. All members of Hyphomycetes are members of Fungi, and all members of Fungi are members of Hyphomycetes
- D. No member of Hyphomycetes is a member of Fungi Discuss
Correct Answer: All members of Hyphomycetes are also members of Fungi, but not all members of Fungi are members of Hyphomycetes
- 9. All of the following species are considered coliforms except
Options- A. Enterobacter aerogenes
- B. Klebsiella pneumoniae
- C. Salmonella typhi
- D. Escherichia coli Discuss
Correct Answer: Salmonella typhi
- 10. Coliforms are used as indicator organisms because
Options- A. they are present wherever enteric pathogens are present
- B. a testing procedure with great specificity is easy to perform
- C. both (a) and (b)
- D. none of the above Discuss
Correct Answer: both (a) and (b)
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