Mineral Nutrition Objective Questions
- In plants, a common symptom caused by deficiency of P, K, Ca and Mg is the
(a) bending of leaf tip
(b) formation of anthocyanins
(c) poor development of vasculature
(d) appearance of dead necrotic tissue
Answer: (d) appearance of dead necrotic tissue
- Function of zinc is
(a) Closing of stomata
(b) Biosynthesis of 3-IAA
(c) Synthesis of chlorophyll
(d) Oxidation of carbohydrate
Answer: (c) Synthesis of chlorophyll
- Which of the following is a group of micronutrients?
(a) Ca, Zn, B
(b) Fe, Mn, Cu
(c) Cl, C, Ca
(d) Ni, Mo, H
Answer: (b) Fe, Mn, Cu
- The process of conversion of NO2– to N2 is called
(a) nitrification
(b) ammonification
(c) denitrification
(d) nitrogen fixation
Answer: (c) denitrification
- The formation of first stable product of nitrogen fixation is catalysed by enzyme
(a) dehydrogenase
(b) nitrogenase
(c) isomerase
(d) none of these
Answer: (b) nitrogenase
- Manganese toxicity leads to deficiency of
(a) iron
(b) calcium
(c) magnesium
(d) all of the above
Answer: (d) all of the above
- Chlorosis will occur if a plant is grown in
(a) dark
(b) shade
(c) strong light
(d) Fe – free medium
Answer: (d) Fe – free medium
- Choose the correct function of magnesium.
(a) It is a constituent of several coenzyme.
(b) It activates the enzymes of respiration and photosynthesis.
(c) It activates enzyme catalase.
(d) It helps in maintaining anion-cation balance.
Answer: (b) It activates the enzymes of respiration and photosynthesis.
- Mineral salts which are absorbed by the roots from soil are in the form of
(a) Dilute solution
(b) Very concentrated solution
(c) Concentrated solution
(d) Very dilute solution
Answer: (d) Very dilute solution
- Which one of the following mineral elements plays an in biological nitrogen fixation?
(a) Copper
(b) Manganese
(c) Zinc
(d) Molybdenum
Answer: (d) Molybdenum
- Oxygen scavangers present in root nodules of legumes is
(a) haemoglobin
(b) leg haemoglobin
(c) cyano haemoglobin
(d) none of these
Answer: (b) leg haemoglobin
- Which one of the following is not a micronutrient?
(a) Magnesium
(b) Molybdenum
(c) Boron
(d) Zinc
Answer: (a) Magnesium
- Which of the following is not a macronutrient
(a) iron
(b) calcium
(c) manganese
(d) phosphorus
Answer: (c) manganese
- Insectivorous plants grow where
(a) There is carbohydrate deficient soil
(b) There is nitrogen deficient soil
(c) Vitamin c is required
(d) Hormones are required
Answer: (b) There is nitrogen deficient soil
- Phytotron is meant for
(a) Controlled humidity
(b) Induction of mutations
(c) Controlled irradiation
(d) Growing plants under controlled environment
Answer: (d) Growing plants under controlled environment
- Toxicity of which element leads to the appearance of brown spots on leaves
(a) Mg
(b) Mn
(c) Fe
(d) Cu
Answer: (b) Mn
- Presence of phosphorus
(a) brings about healthy root growth
(b) promotes fruit ripening
(c) retards protein formation
(d) none
Answer: (c) retards protein formation
- Which element is required for opening and closing of stomata?
(a) P
(b) K
(c) Ca
(d) Na
Answer: (b) K
- Exanthema is due to deficiency of
(a) B
(b) Mo
(c) Mn
(d) Cu
Answer: (d) Cu
- NPK denotes
(a) Nitrogen, Protein, Kinetin
(b) Nitrogen, Protein, Potassium
(c) Nitrogen, Potassium, kinetin
(d) Nitrogen, Phosphorus, Potassium
Answer: (d) Nitrogen, Phosphorus, Potassium
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