Mineral Nutrition - Online Test
Q1. Zn2+ is an activator of
Answer : Option C
Explaination / Solution:
Zn2+ also serves as an activator of a group of enzymes: alcohol dehydrogenase, pyridine nucleotide dehydrogenase, carboxypeptidase.
Q2. Which is an important constituent of protein involved in transfer of electrons?
Answer : Option D
Explaination / Solution:
Plants obtain iron in the form of ferric ions (Fe3+). It is required in larger amounts in comparison to other micronutrients. It is an important constituent of proteins involved in the transfer of electrons like ferredoxin.
Q3. The ion which activates many enzymes involved in photosynthesis,respiration, nitrogen metabolism is
Answer : Option D
Explaination / Solution:
It is absorbed in the form of manganous ions (Mn2+). It activates many enzymes involved in photosynthesis, respiration and nitrogen metabolism.
Q4. Micronutrients are otherwise called as
Answer : Option D
Explaination / Solution:
Micronutrients or trace elements, are needed in very small amounts(less than 10 mole Kg –1 of dry matter). These include iron, manganese, copper, molybdenum, zinc, boron, chlorine and nickel.
Q5. The elements involved in delay of flowering if their concentration is low are
Answer : Option D
Explaination / Solution:
Deficiency of N, K, S and Mo causes stunted growth because of inhibition of cell division. Deficiency of N, S and Mo delays flowering.
Q6. The requirement of micro nutrient are always low if the concentration increases it leads to
Answer : Option D
Explaination / Solution:
The requirement of micronutrients is always in low amounts while their moderate decrease causes the deficiency symptoms and a moderate increase causes toxicity.
Q7. The excess of manganese may induce deficiency in
Answer : Option C
Explaination / Solution:
Excess of manganese may, in fact, induce deficiencies of iron, magnesium and calcium. Thus, what appears as symptoms of manganese toxicity may actually be the deficiency symptoms of iron, magnesium and calcium.
Q8. The cupric ions are essential for
Answer : Option C
Explaination / Solution:
Copper is absorbed as cupric ions (Cu2+).
It activates some enzymes in plants which are involved in lignin synthesis and it is essential in several enzyme systems. It is also required in the process of photosynthesis, is essential in plant respiration and assists in plant metabolism of carbohydrates and proteins.
Q9. Element that is necessary for controlling metabolic activities is
Answer : Option A
Explaination / Solution:
Calcium activates certain enzymes and plays an important role in regulating metabolic activities.
Q10. The morphological changes are indicative of certain element deficiencies and are called
Answer : Option B
Explaination / Solution:
Deficiency symptoms are morphological changes in plants, indicating nutrient deficiency. Deficiency symptoms vary from one element to another.
