Mineral Nutrition - Online Test
Q1. The deficiency symptoms in nitrogen,potassium, magnesium is clearly visible first in
Answer : Option C
Explaination / Solution:
Nitrogen deficiency symptoms include poor plant growth, and leaves that are pale green or yellow.
Symptoms of potassium deficiency in plants include brown scorching and curling of leaf tips as well as chlorosis (yellowing) between leaf veins.
The main symptom of magnesium deficiency, chlorosis, or yellowing between leaf veins.
Q2. Micronutrients which is component of all organic compounds but not obtained from soil
Answer : Option D
Explaination / Solution:
Most of the micronutrients are obtained from soil. Micronutrient which is present in all organic compounds is carbon that is not obtained from soil.
Q3. Element involved in the synthesis of cell wall and storage material are called
Answer : Option D
Explaination / Solution:
Those minerals that are involve in the synthesis of cell wall and storage material are called framework element. Calcium, Magnesium, Carbon includes framework elements.
Q4. The most common mineral elements which became deficient in agricultural soil are
Answer : Option B
Explaination / Solution:
The minerals elements like nitrogen, phosphorus and potassium are required by plants in larger quantity. These elements becomes deficient in agricultural soil.
Q5. Plants with Zinc deficiency show reduced biosynthesis of
Answer : Option A
Explaination / Solution:
Plants with Zinc deficiency show reduced biosynthesis of Auxin. Auxin play most important role in growth and elongation of plants by cell division and cell differentiation.
Q6. Those essential element which occur in 1-10 mg/g of dry matter are
Answer : Option A
Explaination / Solution:
The nutrient required in larger quantity is called macronutrients. Those essential elements which occur in 1-10mg/g quantity is called macronutrients.
Q7. Which two minerals are not needed by the majority of plants but very much needed by almost all animals?
Answer : Option C
Explaination / Solution:
Sodium and Iodine minerals are not needed by the majority of plants but sodium and iodine minerals are very much needed by almost all animals. Sodium play important role in nervous system and iodine for synthesis thyroxine hormone.
Q8. In plant, nitrate is reduced to ammonia state in two steps. In second step electrons are donated by
Answer : Option B
Explaination / Solution:
During ammonification process involve conversion of nitrate into ammonia. This process involves two steps. Second steps require electron that is donated by Ferredoxin.
Q9. Most active nitrogen fixer in Rice field is
Answer : Option C
Explaination / Solution:
Rice field contains large number of nitrogen fixing algae and bacteria. In which Aulosira fertilissima is most active nitrogen fixer in the rice field.
Q10. Which one is not a reason of mineral depletion in the soil?
Answer : Option D
Explaination / Solution:
Mineral deficiency in soil may be due to use of high yielding varieties, non-rotation of crops and leeching of minerals. Growing leguminous plants do not deplete the mineral in soil.
