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Neet Botany Mineral Nutrition Mcq
Quiz 13
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Q.1
Assertion: Deficiency symptoms of N, K and Mg are first visible in the senescent leaves. Reason: Biomolecules containing these elements are broken down in the older leaves, making these elements available for mobilising to younger leaves.
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a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
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b) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
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c) Assertion is true but Reason is false.
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d) Both Assertion and Reason are false.
Explanation
Answer:(a)
Q.2
Which one of the following is essential for photolysis of water?
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a) Manganese.
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b) Zinc.
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c) Copper.
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d) Boron.
Explanation
Answer:(a)
Q.3
In which form Phosphorous is absorbed from soil ?
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a) H3PO4-
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b) HPO4-
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c) H2PO4-
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d) H4P2O7-
Explanation
Answer:(c)
Q.4
Toxicity of Mn inhibits function of which other elements ?
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a) Fe, Mg, S
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b) Ca, Fe, Mg
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c) Mg, K, Fe
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d) Ca, P, S
Explanation
Answer:(b)
Q.5
Pick out the matching sequence:
(A)
Calcium and sulphur
Absorbed by plants in the form of bivalent ions
Deficiency symptoms appeared in younger tissues
Both are enzyme stimulators
(B)
Magnesium and Phosphorus
Major elements
Required by 1 – 10mg/gm of dry matter
Energy related elements
(C)
Silicon and selenium
Beneficial elements
Required by all plants in small quantities
Require less than 0.1mg/gm of dry matter
(D)
Molybdenum
Tracer element
Involved in nitrogen metabolism
Stimulates nitrate reductase enzymes
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a) A
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b) B
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c) C
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d) D
Explanation
Answer:(b)
Q.6
Boron is absorbed by plants as BO33- and B4O72-. How many of the following are functions of Boron? (i) Uptake and utilisation of calcium. (ii) Membrane functioning. (iii) Pollen germination. (iv) Cell elongation, cell differentiation and carbohydrate translocation.
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a) (i) and (iii)only.
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b) (i), (ii) and (iv) only.
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c) (iv) only.
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d) (i), (ii), (iii) and (iv).
Explanation
Answer:(d)
Q.7
Find out the false statement regarding leg haemoglobin:
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a) Nodule contains an oxygen binding haem protein called leg haemoglobin which is present in the cytoplasm of infected nodule cells at high concentration.
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b) The host plant produce both globin portion and haem portion of leg haemoglobin to infection by the bacteria.
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c) It provides sufficient oxygen to Bacterioids.
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d) It is a pink coloured substance.
Explanation
Answer:(b)
Q.8
In plants, mineral nutrition, elements are called macro and micro elements depending upon their:
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a) Relative presence in plant ash.
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b) Relative importance in plant growth.
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c) Relative amount required in plants.
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d) Relative availability in soil.
Explanation
Answer:(c)
Q.9
Which element deficiency shows bronzing leaves ?
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a) K
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b) N
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c) Ca
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d) S
Explanation
Answer:(a)
Q.10
Write an example of bacteria and the process which is responsible for reducing nitrates to gaseous nitrogen ?
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a) Agrobacterium and Nitrification
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b) Pseudomonas and Agrobacterium
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c) Nitrosomonas and Denitrification
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d) Agrobacterium and Denitrification
Explanation
Answer:(d)
Q.11
Assertion: Excess manganese in soil, can adversely decrease magnesium, iron and calcium in the soil. Reason: Manganese increases the rate of photosynthesis thereby increasing the absorption of Mg, Fe and Ca from the soil.
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a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
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b) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
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c) Assertion is true but Reason is false.
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d) Both Assertion and Reason are false.
Explanation
Manganese (Mn) is a micronutrient. Excess of it in soil can cause manganese toxicity characterized by brown spots surrounded by chlorotic veins.It occurs due to (i) reduction in uptake of iron and magnesium. (ii) inhibition of binding of magnesium to specific enzymes (iii) inhibition of calcium translocation into shoot apex.Therefore excess of manganese (Mn) causes deficiency of iron (Fe), magnesium (Mg) and calcium (Ca). Hence the toxicity symptoms of Mn are actually combined deficiency symptoms of Fe, Mg and Ca Answer:(d)
Q.12
Match the following columns:
Column I
Column II
a. Rhizobium leguminosarum
Cereal roots
b. Ureides
Azolla
c. Azospirillum brasiliense
Pisum sativum
d. Frankia
Soybeans
e. Anabaena
Alnus
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a) a →3 ; b →4 ; c →1 ; d →5 ; e →2 ;
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b) a →4 ; b →3 ; c →1 ; d →2 ; e →5 ;
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c) a →5 ; b →4 ; c →2 ; d →1 ; e →3 ;
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d) a →3 ; b →5 ; c →4 ; d →1 ; e →2 ;
Explanation
Answer:(a)
Q.13
Deficiency of which mineral causes shortening of internodes and reduction in cambium activity ?
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a) K
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b) Fe
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c) Cu
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d) B
Explanation
Answer:(a)
Q.14
What is responsible for N2 fixation in Rhizobium ?
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a) nif - gene
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b) leghemoglobin
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c) Nitrogenase
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d) ATP
Explanation
Answer:(a)
Q.15
Match the following:
Column I
Column II
a. Necrosis
Ca, Mg, Cu, K.
b. Chlorosis
N, K, S, Mo.
c. Inhibition of cell division.
N, S, Mo.
d. Delayed flowering
Fe, Mg.
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a) a → 1; b → 2; c →3; d → 4
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b) a → 4; b → 2; c →1; d → 3
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c) a →2; b → 3; c →1; d → 4
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d) a → 1; b → 4; c →2; d → 3
Explanation
Answer:(d)
Q.16
Amonification is the release of NH3 after the death of plants and animals and their degradation. Find the mistake in the given statement.
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a) Conversion of NH3 into NO2- and 3NO3- is not mentioned.
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b) Excretory substances of dead bodies is not mentioned.
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c) Microbes responsible for degradation in the process are not mentioned.
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d) Release of NH3 from N2 containing substances (denitrification) is not mentioned.
Explanation
Answer:(c)
Q.17
Which element is required for absorption and utilization of calcium ?
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a) Fe
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b) Cu
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c) B
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d) K
Explanation
Answer:(c)
Q.18
Refer the given reaction, what does it depict?
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a) Oxidative amination.
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b) Transamination.
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c) Reductive amination.
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d) Deamination.
Explanation
Answer:(b)
Q.19
Nitrogen is an important constituent of ... ... [ AMU 1998]
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a) Polyphosphates
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b) Carbohydrates
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c) Proteins
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d) Lipids
Explanation
Protein is made up of amino acids in which the main element present is Nitrogen. Answer : (c)
Q.20
Match the column .... ..... [ kerala 2006 ]
a) Aerobic
Frankia
b) Cyanobacteria
2.
Azospirillum
c)
Casuarina
3.
Clostridium
d) Tropical grasses
Aulosira
- - - -
Azotobacter
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a) a - 4, b - 3, c - 2, d - 1
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b) a - 5, b - 3, c - 4, d - 1
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c) a - 5, b - 4, c - 1, d - 2
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d) a - 3, b - 5, c - 4, d - 2
Explanation
Azotobacter are aerobic, free-living soil microbes that play an important role in the nitrogen cycle. a - 5 Aulosira is a genus of cyanobacteria found in a variety of environmental niches . b - 4 Symbiotic nitrogen-fixing associations between Casuarina trees and the actinobacteria Frankia are widely used in agroforestry. c - 1 Bacteria of the genus Azospirillum were isolated from the rhizosphere of many grasses and cereals all over the world, in tropical as well as in temperate climates. d - 2 Answer:(c)
Q.21
Element required in least quantity is ... ... [ AMU 1997]
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a) Zn
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b) Mn
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c) Mo
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d) Cl
Explanation
Molybdenum (Mo) is a trace element found in the soil Answer : (c)
Q.22
Function of red pigment leghaemoglobin present in root nodules of leguminous plants is to regulate ... .... [ AMU 2011]
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a) CO2 supply in cells
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b) Mo supply to cells
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c) O2 supply to cells
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d) Production of phenolic compounds
Explanation
Leghemoglobin (also leghaemoglobin or legoglobin) is an oxygen carrier and hemoprotein found in the nitrogen-fixing root nodules of leguminous plants. Answer : (c)
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