In-Situ Bioremediation

Description: In-Situ Bioremediation Quiz
Number of Questions: 15
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Tags: biotechnology environmental science pollution remediation
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What is the primary goal of in-situ bioremediation?

  1. To remove contaminants from soil and groundwater

  2. To enhance the growth of beneficial microorganisms

  3. To stimulate the degradation of pollutants

  4. All of the above


Correct Option: D
Explanation:

In-situ bioremediation aims to remove contaminants from soil and groundwater by stimulating the growth of beneficial microorganisms and enhancing the degradation of pollutants.

Which of the following is NOT a common type of in-situ bioremediation?

  1. Aerobic bioremediation

  2. Anaerobic bioremediation

  3. Phytoremediation

  4. Mycoremediation


Correct Option: C
Explanation:

Phytoremediation is a type of ex-situ bioremediation, where plants are used to remove contaminants from soil and groundwater. Aerobic and anaerobic bioremediation, as well as mycoremediation, are all types of in-situ bioremediation.

What is the role of microorganisms in aerobic bioremediation?

  1. They break down contaminants using oxygen

  2. They create an anaerobic environment

  3. They produce enzymes that degrade pollutants

  4. Both A and C


Correct Option: D
Explanation:

In aerobic bioremediation, microorganisms use oxygen to break down contaminants. They also produce enzymes that help degrade pollutants.

Which of the following is NOT a common contaminant targeted by anaerobic bioremediation?

  1. Petroleum hydrocarbons

  2. Chlorinated solvents

  3. Heavy metals

  4. Pesticides


Correct Option: C
Explanation:

Heavy metals are typically not targeted by anaerobic bioremediation, as they are not biodegradable. Petroleum hydrocarbons, chlorinated solvents, and pesticides are all common contaminants that can be treated using anaerobic bioremediation.

What is the primary mechanism by which plants contribute to phytoremediation?

  1. They absorb and accumulate contaminants from soil and groundwater

  2. They release enzymes that break down pollutants

  3. They create an aerobic environment in the soil

  4. Both A and C


Correct Option: D
Explanation:

Plants contribute to phytoremediation by absorbing and accumulating contaminants from soil and groundwater. They also create an aerobic environment in the soil, which promotes the growth of beneficial microorganisms that can further degrade pollutants.

Which of the following is NOT a common type of fungus used in mycoremediation?

  1. White-rot fungi

  2. Brown-rot fungi

  3. Aspergillus niger

  4. Trichoderma harzianum


Correct Option: C
Explanation:

Aspergillus niger is a common fungus used in ex-situ bioremediation, not in-situ bioremediation. White-rot fungi, brown-rot fungi, and Trichoderma harzianum are all common types of fungi used in mycoremediation.

What is the primary advantage of in-situ bioremediation over ex-situ bioremediation?

  1. It is less expensive

  2. It is more effective

  3. It is less disruptive to the environment

  4. Both A and C


Correct Option: D
Explanation:

In-situ bioremediation is generally less expensive and less disruptive to the environment compared to ex-situ bioremediation, as it does not require the excavation or removal of contaminated soil and groundwater.

Which of the following factors can limit the effectiveness of in-situ bioremediation?

  1. Low microbial activity

  2. Lack of oxygen

  3. High concentrations of contaminants

  4. All of the above


Correct Option: D
Explanation:

Low microbial activity, lack of oxygen, and high concentrations of contaminants can all limit the effectiveness of in-situ bioremediation.

What is the role of bioaugmentation in in-situ bioremediation?

  1. It involves the addition of beneficial microorganisms to the contaminated site

  2. It stimulates the growth of existing microorganisms

  3. It enhances the degradation of pollutants

  4. Both A and C


Correct Option: D
Explanation:

Bioaugmentation involves the addition of beneficial microorganisms to the contaminated site to stimulate their growth and enhance the degradation of pollutants.

Which of the following is NOT a common method for monitoring the progress of in-situ bioremediation?

  1. Groundwater sampling

  2. Soil sampling

  3. Microbial community analysis

  4. Gas chromatography


Correct Option: D
Explanation:

Gas chromatography is not a common method for monitoring the progress of in-situ bioremediation. Groundwater sampling, soil sampling, and microbial community analysis are all common methods used to assess the effectiveness of bioremediation.

What is the primary goal of intrinsic bioremediation?

  1. To stimulate the growth of beneficial microorganisms

  2. To enhance the degradation of pollutants

  3. To rely on natural processes to remediate contamination

  4. Both A and C


Correct Option: D
Explanation:

Intrinsic bioremediation aims to stimulate the growth of beneficial microorganisms and enhance the degradation of pollutants by relying on natural processes.

Which of the following is NOT a common strategy for enhancing intrinsic bioremediation?

  1. Bioaugmentation

  2. Biostimulation

  3. Phytoremediation

  4. Mycoremediation


Correct Option: C
Explanation:

Phytoremediation is not a strategy for enhancing intrinsic bioremediation, as it involves the use of plants to remove contaminants from soil and groundwater. Bioaugmentation, biostimulation, and mycoremediation are all common strategies for enhancing intrinsic bioremediation.

What is the primary advantage of intrinsic bioremediation over enhanced bioremediation?

  1. It is less expensive

  2. It is more effective

  3. It is less disruptive to the environment

  4. Both A and C


Correct Option: D
Explanation:

Intrinsic bioremediation is generally less expensive and less disruptive to the environment compared to enhanced bioremediation, as it relies on natural processes and does not require the addition of external amendments or microorganisms.

Which of the following factors can limit the effectiveness of intrinsic bioremediation?

  1. Low microbial activity

  2. Lack of oxygen

  3. High concentrations of contaminants

  4. All of the above


Correct Option: D
Explanation:

Low microbial activity, lack of oxygen, and high concentrations of contaminants can all limit the effectiveness of intrinsic bioremediation.

What is the role of monitoring in in-situ bioremediation?

  1. To assess the effectiveness of the remediation process

  2. To identify any potential risks or problems

  3. To ensure compliance with regulatory requirements

  4. All of the above


Correct Option: D
Explanation:

Monitoring in in-situ bioremediation is essential to assess the effectiveness of the remediation process, identify any potential risks or problems, and ensure compliance with regulatory requirements.

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