Mineral Nutrition - Online Test

Q1. The productivity of a soil depends upon the proportionate amount of deficient mineral is called
Answer : Option B
Explaination / Solution:

Justus von Liebig's Law of the Minimum states that yield is proportional to the amount of the most limiting nutrient, whichever nutrient it may be. From this, it may be inferred that if the deficient nutrient is supplied, yields may be improved to the point that some other nutrient is needed in greater quantity than the soil can provide, and the Law of the Minimum would apply in turn to that nutrient.

Q2. Dark brown amorphous substance formed by degradation of cellulose and lignin in the soil to increase water holding capacity and aeration is
Answer : Option A
Explaination / Solution:

Dark brown amorphous substance formed by degradation of cellulose and lignin in the soil to increase water holding capacity and aeration is humus. It also increase fertility of the soil.

Q3. Main function of Nickel (Ni2+) in leaves and root is
Answer : Option B
Explaination / Solution:

Main function of Nickel ions in leaves and root is metabolism of urea and ureides to form amino acids and protein in plant body.

Q4. In legumes, rhizobium bacteria are found in
Answer : Option D
Explaination / Solution:

Nitrogen-fixing bacteria, especially roots of legumes, can fix this atmospheric nitrogen into biologically usable forms.

Q5. Element required for nitrogen metabolism is
Answer : Option C
Explaination / Solution:

Plants obtain it in the form of molybdate ions. It is a component of several enzymes, including nitrogenase and nitrate reductase both of which participate in nitrogen metabolism.

Q6. Hydroponics refers to growing plant in
Answer : Option A
Explaination / Solution:

Hydroponics is a subset of hydroculture, the method of growing plants without soil, using mineral nutrient solutions in a water solvent.

Q7. It is the technique of growing plants in above-ground strands provided with fine mist of normal solution.
Answer : Option B
Explaination / Solution:

Aeroponics is the technique of growing plants in above ground strands provided with fine mist of normal solution. It is used to know the deficiency symptoms of minerals.

Q8. Plant with zinc deficiency show reduced biosynthesis of
Answer : Option B
Explaination / Solution:

Plants obtain zinc as Zn2+ ions. It activates various enzymes,especially carboxylases. It is also needed in the synthesis of auxin.If there is deficiency in zinc to plants then it leads to reduced synthesis of auxin.

Q9. Element present in middle lamella
Answer : Option C
Explaination / Solution:

Calcium is required by meristematic and differentiating tissues. During cell division it is used in the synthesis of cell wall, particularly as calcium pectate in the middle lamella.

Q10. The most abundant element found in plants is
Answer : Option A
Explaination / Solution:

Carbon is generally present in plant tissues in large amounts and mainly obtained from CO2 and H2O.