Environmental Biotechnology Multiple Choice Questions on “Kinetic Modelling of Bioaccumulation”.
1. The amount of toxicants and chemicals that accumulates in the ecosystem after the transfer is called as ________
a) Bio accumulated
b) Bio-polluted
c) Bio hazard
d) Bio degradation
Answer: a
Clarification: Bio accumulated is the term used for the amount of toxicants and chemicals that accumulates in the ecosystem after the transfer between various subsystems of the ecosystem whereas bio hazard is the term used for describing something the ill effects of a pollutant, bio polluted is the pollution caused by biological things, biodegradation is the breaking down of organic compounds by microorganisms.
2. Volatilization is the main pathway through which the toxicant returns to the air.
a) True
b) False
Answer: a
Clarification: Volatilization is the pathway through which the toxicant returns to the air from its source.
3. Which of the following is considered as a subsystem of an ecosystem?
a) Nutrient load
b) Temperature
c) Lipophilicity
d) Air
Answer: d
Clarification: Air, water and soil is considered as subsystems of an ecosystem whereas, chemical accumulation in the organism depends upon the lipid content and lipophilicity of an organism, the toxicant accumulation depends upon certain environmental conditions like Nutrient load, Temperature, pH.
4. The chemicals get accumulated in the subsystems of ecosystem and gets transferred at specific transfer rates.
a) True
b) False
Answer: a
Clarification: The chemicals or the toxicants get accumulated in the subsystems of ecosystem like air, water and soil and are exchanged between at specific transfer rates.
5. The chemical escapes into the environment through excretion and exudation.
a) True
b) False
Answer: a
Clarification: The chemical can escape from the food chain and enter into the environment through excretion and exudation.