This set of Environmental Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Dose – Effect Relationship Analysis – Graded Response”.
1. Which of the following shows effect on a continuous scale?
a) Graded dose response
b) Quantal dose Response
c) Mg dose Response
d) Cu dose Response
View Answer
Explanation: Graded dose response shows effect on a continuous scale. Response vs dose on x-y plane respectively shoes curve on a continuous scale whereas, Quantal dose Response, Mg dose Response and Cu Dose Response may not show continuous scale.
2. Which of the following is proportional to the dose in a Graded dose response scale?
a) Intensity of the effect
b) Color of the effect
c) Concentration of the effect
d) Toxicity of the effect
View Answer
Explanation: In Graded dose response curve which shows effect on a continuous scale, the Intensity of the effect is proportional to the dose. Response vs dose on x-y plane respectively shoes curve on a continuous scale whereas, Color of the effect, Concentration of the effect and toxicity of the effect is independent of the same.
3. Which of the following is not a major characteristic of Acidic soils?
a) Low pH
b) High pH
c) Texture
d) Color
View Answer
Explanation: The property of acidic soils is low pH, high soil shows the alkalinity, texture which helps to determine the texture of the soil or the type of the soil if it is acidic or not. Whereas, color does not help to determine whether the soil is acidic or not.
4. Which of the following ions is not found in excess in acidic soils?
a) Al
b) Fe
c) Mg
d) Cu
View Answer
Explanation: Acidic soils are generally characterized by low pH, hence, certain dissolved ions are found in these soils in excessive amounts like Al, Fe, Cu whereas the soil is deficient in Mg ions and hence, is not found in excess in acidic soils.
5. Bioconcentration factor is the concentration of a pollutant in an organism compared to that present in the environment.
a) True
b) False
View Answer
Explanation: Bio concentration factor is a term used to refer to the amount of pollutants from the environment that is concentrated in the organism over a period of time. With time, specific concentration of a pollutant accumulates in an organism.
6. Which of the following is majorly found in acid sulphate soils?
a) Pyrite
b) Copper
c) Aluminum
d) Magnesium
View Answer
Explanation: Major components of acid sulphate soils is pyrite which is basically iron sulphide which is converted into sulphuric acid, Copper, Aluminum and Magnesium are majorly not found in acid sulphate soils.
7. Which of the following causes nutrient deficiency in crops that are grown on acidic sulphate soils?
a) Aluminum toxicity
b) Sodium toxicity
c) Oxygen toxicity
d) Nitrogen toxicity
View Answer
Explanation: Crops grown on acidic sulphate soils gets destroyed as a result of Aluminum toxicity in the soil, also, the soil is acidic and crops doesn’t grow well on that, also, nutrient deficiency is the major caused, Sodium toxicity and Oxygen toxicity, Nitrogen toxicity is not found in certain soil conditions.
8. Which of the following substance can be used for soil reclamation?
a) Gypsum
b) Citric acid
c) Phosphoric acid
d) Oxalic acid
View Answer
Explanation: Gypsum is the byproduct of the certain acids like Citric acid, Phosphoric acid, Oxalic acid which are released from manufacturing industries, whereas, the byproduct I.e. gypsum is used for sodic soil reclamation.
9. Adding Farm yard Manure or FYM to the soil helps in reclamation.
a) True
b) False
View Answer
Explanation: Farm yard Manure or FYM when added to the sodic soils, it increases the activity of gypsum and helps to in improving the reclamation of the soil. FYM is a very important constituent that helps in reclamation.
10. Sesbania aculeata can be used for soil reclamation.
a) True
b) False
View Answer
Explanation: Sesbania aculeata is a type of green crop manure which can be used for soil reclamation processes, especially of alkali soils. This process helps to increase effectiveness of soil reclamation process.
11. Which of the following in deficient in saline soils?
a) Nitrogen
b) Sulphur
c) Oxygen
d) Calcium
View Answer
Explanation: Nitrogen is deficient in saline soils due to low organic matter content. And hence, it is found in lower levels. Whereas, Sulphur, Oxygen, Calcium are either present in lower concentrations or present in larger amounts in saline soils.
12. Lime can be used for soil reclamation.
a) True
b) False
View Answer
Explanation: Lime is usually used for soil reclamation of acidic soils as it helps to improve base saturation and reduce phosphorus fixation. This increases the recovery process, leads to faster replenishment of the natural materials and hence, their recovery.
Sanfoundry Global Education & Learning Series – Environmental Biotechnology.
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