Mineral Nutrition - Online Test
Q1. Influx and efflux of H+ ions inside the cell change the
Answer : Option D
Explaination / Solution:
pH of a solution is depends upon hydrogen ions concentration. Influx and efflux of H+ ions inside the cell change the pH of solution present in soil.
Q2. Minerals present in the soil are absorbed by
Answer : Option D
Explaination / Solution:
Most of the minerals present in soil can enter plants through roots.
Q3. Entry of ions into cells is called
Answer : Option D
Explaination / Solution:
Entry of ions into cells is called influx. Influx takes place actively against the concentration gradient by utilization of energy through plasmodesmata of plant cells.
Q4. Which one of the following organism help in absorption of phosphorus from soil by plants
Answer : Option B
Explaination / Solution:
Glomus is a kind of algae found in soil. This organism help in absorption of phosphorous form soil by plants.
Q5. Element required for germination of pollen grain is
Answer : Option B
Explaination / Solution:
Elements play important role in completing life cycles of plants. Element required for germination of pollen grain is Boron.
Q6. Non-symbiotic nitrogen fixing prokaryote is
Answer : Option C
Explaination / Solution:
Most of the prokaryotic nitrogen fixing prokaryotes are symbiotic in nature. Azatobacter is a bacteria which is non-symbiotic nitrogen fixing prokaryote.
Q7. Main role of minor elements is to act as
Answer : Option D
Explaination / Solution:
Micronutrients are required in very small quantity. The main role of micronutrients is to act as cofactor of enzyme. Co-factors increase the efficiency of enzymes.
Q8. Which one is not a element deficiency symptoms
Answer : Option D
Explaination / Solution:
Deficiency of elements in plants manifest as symptoms like chlorosis, necrosis, scorched leaf tips etc. smaller fruit size is not a deficiency symptoms.
Q9. Grey spots of Oat are due to deficiency of
Answer : Option C
Explaination / Solution:
Manganese deficiency in Oat appear as grey spots on leaves of oat. Rate of photosynthesis is also influenced by the Manganese elements.
Q10. Sulphur is important nutrient for optimum growth and productivity of
Answer : Option A
Explaination / Solution:
Sulphur is an important nutrient for optimum growth and productivity of pulse crops, because sulphur is important in protein synthesis of plants.
