In this practice test, we have included the 25 most important multiple choice questions from the chapter- Mineral Nutrition (Class 11th Biology). Attempt this test to know your score and practice for a quick revision before the exam.
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Q.1.
In plants, a common symptom caused by deficiency of P, K, Ca and Mg is the
- bending of leaf tip
- formation of anthocyanins
- poor development of vasculature
- appearance of dead necrotic tissue
Answer:
(d) appearance of dead necrotic tissue
Explanation: appearance of dead necrotic tissue
Explanation: appearance of dead necrotic tissue
Q.2.
Function of zinc is
- Closing of stomata
- Biosynthesis of 3-IAA
- Synthesis of chlorophyll
- Oxidation of carbohydrate
Answer:
(c) Synthesis of chlorophyll
Explanation: Synthesis of chlorophyll
Explanation: Synthesis of chlorophyll
Q.3.
Which of the following is a group of micronutrients?
- Ca, Zn, B
- Fe, Mn, Cu
- Cl, C, Ca
- Ni, Mo, H
Answer:
(b) Fe, Mn, Cu
Explanation: Iron, mangenese and copper are micronutrients
Explanation: Iron, mangenese and copper are micronutrients
Q.4.
The process of conversion of NO2– to N2 is called
- nitrification
- ammonification
- denitrification
- nitrogen fixation
Answer:
(c) denitrification
Explanation: The process of conversation of NO2– to N2 is called denitrification
Explanation: The process of conversation of NO2– to N2 is called denitrification
Q.5.
The formation of first stable product of nitrogen fixation is catalysed by enzyme
- dehydrogenase
- nitrogenase
- isomerase
- none of these
Answer:
(b) nitrogenase
Explanation: The first stable product of nitrogen fixation is ammonia obtained from atmospheric nitrogen catalysed enzyme nitrogenase
Explanation: The first stable product of nitrogen fixation is ammonia obtained from atmospheric nitrogen catalysed enzyme nitrogenase
Q.6.
Manganese toxicity leads to deficiency of
- iron
- calcium
- magnesium
- all of the above
Answer:
(d) all of the above
Explanation: Manganese toxicity causes deficiency of iron, magnesium and calcium
Explanation: Manganese toxicity causes deficiency of iron, magnesium and calcium
Q.7.
Chlorosis will occur if a plant is grown in
- dark
- shade
- strong light
- Fe – free medium
Answer:
(d) Fe – free medium
Explanation: Fe – free medium
Explanation: Fe – free medium
Q.8.
Choose the correct function of magnesium
- It is a constituent of several coenzyme
- It activates the enzymes of respiration and photosynthesis.
- It activates enzyme catalase
- It helps in maintaining anion-cation balance
Answer:
(b) It activates the enzymes of respiration and photosynthesis.
Explanation: Magnesium is absorbed by plants as Mg2+ it activates the enzymes of respiration and photosynthesis.It is involved in the synthesis of DNA RNA.It is the constituent of ring structure of chlorophyll.
Explanation: Magnesium is absorbed by plants as Mg2+ it activates the enzymes of respiration and photosynthesis.It is involved in the synthesis of DNA RNA.It is the constituent of ring structure of chlorophyll.
Q.9.
Mineral salts which are absorbed by the roots from soil are in the form of
- Dilute solution
- Very concentrated solution
- Concentrated solution
- Very dilute solution
Answer:
(d) Very dilute solution
Q.10.
Which one of the following mineral elements plays an in biological nitrogen fixation?
- Copper
- Manganese
- Zinc
- Molybdenum
Answer:
(d) Molybdenum
Q.11.
Oxygen scavangers present in root nodules of legumes is
- haemoglobin
- leg haemoglobin
- cyano haemoglobin
- none of these
Answer:
(b) leg haemoglobin
Explanation: Leg-haemoglobin is the oxygen scavanger in root nodules of legumes
Explanation: Leg-haemoglobin is the oxygen scavanger in root nodules of legumes
Q.12.
Which one of the following is not a micronutrient?
- Magnesium
- Molybdenum
- Boron
- Zinc
Answer:
(a) Magnesium
Explanation: Magnesium
Explanation: Magnesium
Q.13.
Which of the following is not a macronutrient
- iron
- calcium
- manganese
- phosphorus
Answer:
(c) manganese
Q.14.
Insectivorous plants grow where
- There is carbohydrate deficient soil
- There is nitrogen deficient soil
- Vitamin c is required
- Hormones are required
Answer:
(b) There is nitrogen deficient soil
Explanation: There is nitrogen deficient soil
Explanation: There is nitrogen deficient soil
Q.15.
Phytotron is meant for
- Controlled humidity
- Induction of mutations
- Controlled irradiation
- Growing plants under controlled environment
Answer:
(d) Growing plants under controlled environment
Explanation: Growing plants under controlled environment
Explanation: Growing plants under controlled environment
Q.16.
Toxicity of which element leads to the appearance of brown spots on leaves
- Mg
- Mn
- Fe
- Cu
Answer:
(b) Mn
Explanation: Toxicity of mangenese leads to the appearance of the brown spots with chlorotic veins.
Explanation: Toxicity of mangenese leads to the appearance of the brown spots with chlorotic veins.
Q.17.
Presence of phosphorus
- brings about healthy root growth
- promotes fruit ripening
- retards protein formation
- none
Answer:
(c) retards protein formation
Q.18.
Which element is required for opening and closing of stomata?
- P
- K
- Ca
- Na
Answer:
(b) K
Explanation: Potassium plays an important role in opening and closing of stomata.
Explanation: Potassium plays an important role in opening and closing of stomata.
Q.19.
Exanthema is due to deficiency of
- B
- Mo
- Mn
- Cu
Answer:
(d) Cu
Q.20.
NPK denotes
- Nitrogen, Protein, Kinetin
- Nitrogen, Protein, Potassium
- Nitrogen, Potassium, kinetin
- Nitrogen, Phosphorus, Potassium
Answer:
(d) Nitrogen, Phosphorus, Potassium
Explanation: Nitrogen, Phosphorus, Potassium
Explanation: Nitrogen, Phosphorus, Potassium
Q.21.
The nitrogen exists as two nitrogen atoms joined by
- Di covalent bonds
- tetra covalent bonds
- triple covalent bonds
- monocovalent bond
Answer:
(c) triple covalent bonds
Explanation: triple covalent bonds
Explanation: triple covalent bonds
Q.22.
Biological nitrogen fixation was discovered by
- Gericke
- Nehar and Sakmann
- Liebig
- Winograndsky
Answer:
(d) Winograndsky
Explanation: Winograndsky
Explanation: Winograndsky
Q.23.
The enzyme involved in biological nitrogen fixation are
- Carboxylase
- Oxygenase
- Dehydrogenase
- Nitrogenase
Answer:
(d) Nitrogenase
Explanation: Nitrogenase
Explanation: Nitrogenase
Q.24.
The requirement of micro nutrient are always low if the concentration increases it leads to
- deficiency symptoms
- Cell differentiation
- toxicity
- Cell elongation
Answer:
(c) toxicity
Q.25.
Analysis of xylem sap shows
- presence of enzymes
- presence of organic matter
- presence of nutrients
- presence of mineral salts
Answer:
(d) presence of mineral salts
Explanation: presence of mineral salts
Explanation: presence of mineral salts
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