This set of Advanced Environmental Biotechnology Questions and Answers focuses on “Microbial Transformations of Pesticides – Thioether Oxidation”.
1. Which of the following process leads to degradation of pesticides using microbial population?
a) Green algae
b) Thioether oxidation
c) Heavy metals
d) Oxygen
View Answer
Explanation: Thioether oxidation, usually performed by microbial population by oxidizing the Sulphur present in the pesticides. Heavy metals are not pesticides and they definitely can affect the microbial population in the habitat as they have the potential to degrade the organisms present in the environment. Green algae and oxygen are the compounds that are not harmful to the microbial population or the environment and it not a process that would help in degradation of pesticides using microbial population.
2. Which of the following terms is not relevant to distressing microbial population?
a) Decrease in richness
b) Variety of classes
c) Resistant population
d) Color of species
View Answer
Explanation: Decrease in richness of the population affects the microbial population but the color of species is not a relevant factor to consider for affecting microbial population and hence, it really doesn’t matter in a bigger prospective. Resistant population is selected over the original strain, that affects the microbial population, also, reduction in abundance, diversity of species are the other factors that affects the distressing of microbial population.
3. Pesticides can be degraded better in metal stress.
a) True
b) False
View Answer
Explanation: Pesticides can be degraded by microbial population very efficiently but it has nothing to do with the microbes involved in metal stress. Tolerant microbes are actually those strains of microbes which have somehow become resistance and can survive the condition and some even grow better under stress. But Pesticides and metal stress are not directly related.
4. Which of the following pollution is not responsible for oxidation of Sulphur?
a) Copper
b) Cadmium
c) Zinc
d) Glass
View Answer
Explanation: Oxidation of Sulphur, thioether oxidation, usually performed by microbial population by oxidizing the Sulphur present in the pesticides. Glass contamination is not responsible for oxidation of Sulphur. Copper, cadmium, mercury and zinc etc. are found in the soil which when contaminated leads to variable reduction in bacteria, fungi and actinomycetes in the soil.
5. Which of the following population cannot be affected by pesticides?
a) Cyanobacteria
b) Algae
c) Protozoan
d) Phytoremediation
View Answer
Explanation: Phytoremediation is a method not a populace, also, used to degrade pesticides in the environment using plants, so, they are definitely not affected by heavy metals that would lead to their reduction in the environment. Whereas, cyanobacteria, algae and protozoan are found to be affected by heavy metals in the environment.
6. What of the following is used to remove pesticides using plants?
a) Phyto-extraction
b) Mashing with Adhesives
c) Mashing with Fibers
d) Watering
View Answer
Explanation: Phytoextraction is a process which comes under phytoremediation where plants can be used to remove hazardous elements from soil or may be water like heavy metals, whereas, mashing with adhesives or fibers is not related to the process of removal of metals from plants and watering doesn’t remove heavy metals.
7. How bacteria incorporate pesticides inside them?
a) Slow transport inside the cell
b) Gasification
c) Incineration
d) Disposal
View Answer
Explanation: Disposal is a method that is used for disposing waste, whereas, gasification is the degradation of organic matter in anaerobic conditions and incineration involves chemical reaction which burns the waste generated. Whereas, slow transport of metal inside the cell after binding to the surface ligand of the metals helps in incorporation of heavy metals inside microbes.
8. Which of the following can degrade pesticides?
a) Biogeochemcial cycle
b) Thioether oxidation
c) Afforestation
d) Deforestation
View Answer
Explanation: Thioether oxidation, usually performed by microbial population by oxidizing the Sulphur present in the pesticides. Whereas, biogeochemical cycle is crucial for methanogens, the natural release of biogas in the environment is due to the activity of methanogens, hence, it can’t dissolve metals. Also, afforestation and deforestation cannot dissolve metals.
9. What habitat is not a home for Sulphur degrading bacteria present in pesticides?
a) Snow
b) Soil
c) Rocks
d) Distilled water
View Answer
Explanation: Distilled water is a purified form of water with no or negligible amount of bacteria and hence, that is not a home for bacteria, whereas, snow, soil and rocks can be home for many bacteria. There are near about ten times bacteria found in every habitat than the native organism itself. So, distilled water is the correct option.
10. Which of the following is a method of phytoextraction for removal of Sulphur present in pesticides?
a) Absorption by plant roots
b) Absorption by water
c) Absorption by soil
d) Absorption by weathered rock
View Answer
Explanation: Absorption by plant roots is the technique used in phyto-extraction for removal of metals by absorbing the pesticides by the roots, thereby, removing it from the immediate environment, whereas, absorption by water, soil and weathered rocks cannot remove metals from the environment.
11. Thioether oxidation can remove pesticides.
a) True
b) False
View Answer
Explanation: Thioether oxidation can remove pesticides by oxidizing the Sulphur group present in the pesticides, also, plants can remove components of pesticides for their immediate surroundings by a process called as phyto-remediation, followed by a technique called as phyto-extraction for removal of metals by absorbing the harmful compounds present in pesticides by the roots of the plants. These process are really helpful and it doesn’t cause any side effects to the environment.
Sanfoundry Global Education & Learning Series – Environmental Biotechnology.
To practice advanced questions and answers on all areas of Environmental Biotechnology, here is complete set of 1000+ Multiple Choice Questions and Answers.
If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]
- Check Biotechnology Books
- Practice Biotechnology MCQs
- Apply for Biotechnology Internship
- Check Environmental Biotechnology Books
