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Mineral Nutrition Class 11 MCQs Questions with Answers
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
The process of conversion of NO2– to N2 is called
(a) nitrification
(b) ammonification
(c) denitrification
(d) nitrogen fixation
Answer: (c) denitrification
Manganese toxicity leads to deficiency of
(a) iron
(b) calcium
(c) magnesium
(d) all of the above
Answer: (d) all of the above
The nitrogen exists as two nitrogen atoms joined by
(a) Di covalent bonds
(b) tetra covalent bonds
(c) triple covalent bonds
(d) monocovalent bond
Answer: (c) triple covalent bonds
The enzyme involved in biological nitrogen fixation are
(a) Carboxylase
(b) Oxygenase
(c) Dehydrogenase
(d) Nitrogenase
Answer: (d) Nitrogenase
Analysis of xylem sap shows
(a) presence of enzymes
(b) presence of organic matter
(c) presence of nutrients
(d) presence of mineral salts
Answer: (d) presence of mineral salts
Name the scientist who first showed that plants obtain minerals from the soil for their growth and development.
(a) Woodward
(b) de-Saussure
(c) Armon
(d) Stout
Answer: (a) Woodward
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
Which is essential for root hair growth?
(a) Zn
(b) Mo
(c) Ca
(d) S
Answer: (c) Ca
That element which helps in electron transport in the process of photosynthesis
(a) Zinc
(b) Chlorine
(c) Manganese
(d) Boron
Answer: (c) Manganese
Function of laghaemoglobin during biological nitrogen fixation in root nodules of legumes is to
(a) Protect nitrogenase from Oxygen
(b) Transport Oxygen for nitrogenase activity
(c) Convert ammonium into nitrite
(d) Convert N2 to NH2
Answer: (a) Protect nitrogenase from Oxygen
Those essential element which occur in 1-10 mg/g of dry matter are
(a) Macronutrients
(b) Micronutrients
(c) Toxic elements
(d) Beneficial nutrients
Answer: (a) Macronutrients
Deficiency of which of the following can cause yellowing of intravenous regions of leaves?
(a) Potassium
(b) Calcium
(c) Phosphorus
(d) Copper
Answer: (a) Potassium
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
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
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
Toxicity of which element leads to the appearance of brown spots on leaves
(a) Mg
(b) Mn
(c) Fe
(d) Cu
Answer: (b) Mn
In cabbages, ‘Whiptail’ is a characteristic deficiency disease. It is caused by the deficiency of
(a) Chlorine
(b) Molybdenum
(c) Magnesium
(d) Boron
Answer: (b) Molybdenum
Phosphorous is a constituent of
A. Cell membrane
B. Nucleic acids
C. Cell wall
D. Chlorophyll
(a) C and D
(b) A and B
(c) B and C
(d) D and A
Answer: (b) A and B
The middle lamella mainly contains
(a) Na
(b) Mg
(c) K
(d) Ca
Answer: (d) Ca
Which one of the following microbes forms a symbiotic association with plants and helps them in their nutrition?
(a) Aspergillus
(b) Trichoderma
(c) Glomus
(d) Azotobacter
Answer: (c) Glomus
Nitrogenase enzyme converts
(a) Nitrate and nitrite into nitrogen
(b) Atmospheric nitrogen into ammonia
(c) Ammonia into nitrate and nitrite
(d) Nitrate into nitrite
Answer: (b) Atmospheric nitrogen into ammonia
Choose the odd one out among the following
(a) Pseudomonas
(b) Rhizobium
(c) Azotobacter
(d) Bacillus anabaena
Answer: (a) Pseudomonas
Which element is required for opening and closing of stomata?
(a) P
(b) K
(c) Ca
(d) Na
Answer: (b) K
NPK denotes
(a) Nitrogen, Protein, Kinetin
(b) Nitrogen, Protein, Potassium
(c) Nitrogen, Potassium, kinetin
(d) Nitrogen, Phosphorus, Potassium
Answer: (d) Nitrogen, Phosphorus, Potassium
In plant, nitrate is reduced to ammonia state in two steps. In second step electrons are donated by
(a) Nitrite reductase
(b) Cytochrome b5
(c) Ferredoxin
(d) Nitrate reductase
Answer: (c) Ferredoxin
Exanthema is due to deficiency of
(a) B
(b) Mo
(c) Mn
(d) Cu
Answer: (d) Cu
Which one of the following is a wrong statement?
(a) Greenhouse effect is a natural Phenomenon
(b) Eutrophication is a natural phenomenon in freshwater bodies
(c) Most of the forests have been lost in tropical areas
(d) Ozone in upper part of atmosphere is harmful to animals
Answer: (d) Ozone in upper part of atmosphere is harmful to animals
Influx and efflux of H+ ions inside the cell change the
(a) Na+ ion concentration
(b) Nitrate concentration
(c) pH
(d) Permeability of plasma membrane
Answer: (c) pH
Which among the following is NOT the source of nitrogen?
(a) Automobile exhaust
(b) Xylem
(c) Industrial combustion
(d) Forest fire
Answer: (b) Xylem
It is the technique of growing plants in above-ground strands provided with fine mist of normal solution.
(a) Chemoponics
(b) Hydroponics
(c) Hygroponics
(d) Aeroponics
Answer: (d) Aeroponics
Non-mineral elements of plants are
(a) Carbon, hydrogen and sulphur
(b) Carbon, oxygen and nitrogen
(c) Sulphar, chlorine and nitrogen
(d) Carbon, hydrogen and oxygen
Answer: (d) Carbon, hydrogen and oxygen
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 one of the following mineral elements plays an in biological nitrogen fixation?
(a) Copper
(b) Manganese
(c) Zinc
(d) Molybdenum
Answer: (d) Molybdenum
Denitrification is carried out by
(a) Nitrosomonas
(b) Pseudomonas
(c) Nitrobacter
(d) Nitrococcus
Answer: (b) Pseudomonas
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