Nutrition in Plants Online Test:
Deficiency of iron causes
(a) Bending of leaf tip
(b) Interveinal chlorosis first on young leaves
(c) Decreases of protein synthesis
(d) Reduced leaves and stunted growth
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In absence of essential mineral elements, leaves of many plants turn yellow due to
(a) Plasmolysis
(b) Chlorosis
(c) Necrosis
(d) Etiolation
Apple fruit develop internal cork due to deficiency of
(a) Magnesium
(b) Iron
(c) Manganese
(d) Boron
Mineral absorption occurs
(a) If soil solution is hypotonic
(b) If soil solution is hypertonic
(c) Independent of water potential
(d) Independent of water absorption
Plants that grow over the branches of trees without contact with soil are
(a) Epiphytes
(b) Symbionts
(c) Saprophytes
(d) Parasites
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One of the following is a nitrogen fixing enzyme
(a) Urease
(b) Arginase
(c) Nitrate reductase
(d) All above
Best fertilizer for paddy fields is
(a) Azolla pinnata
(b) Rhizobium melilotii
(c) Bacillus megatherium
(d) Bacillus polymyxa
Nitrogen is a component of
(a) Protein
(b) Chlorophyll
(c) Nucleic acid
(d) All the above
Point out the one which is not an example of passive absorption of minerals
(a) Osmosis
(b) Diffusion
(c) Mass flow
(d) Ionic exchange
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Which is the role of molybdenum
(a) Nitrogen fixation
(b) Chromosome contraction
(c) Flower induction
(d) Carbon assimilation
Insects captured by carnivorous plants partially meet their requirement of
(a) Organic matter
(b) Enzymes
(c) Water
(d) Nitrogen
Calcium gets accumulated in
(a) Differentiating tissues
(b) Older leaves
(c) Buds
(d) Young tissues
Which one is not an essential element in plants
(a) Iron
(b) Boron
(c) Sulphur
(d) Cadmium
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Most of the plants obtain nitrogen from the soil in the form of
(a) Free nitrogen gas
(b) Nitric acid
(c) Nitrites
(d) Nitrates
Macronutrients are elements that
(a) Play major role in plant nutrition
(b) Are required in large quantities in plants
(c) Form large molecules in plants
(d) None of the above
A plant growing on another plant without drawing any nourishment is
(a) Ectoparasite
(b) Epiphyte
(c) Symbiont
(d) Saprophyte
Which of the following is present in the core of chlorophyll molecule
(a) Fe
(b) Mg
(c) K
(d) Mn
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In nitrogen fixation
(a) Plants convert atmospheric nitrogen to nitrates
(b) Plants absorb ammonia from the soil
(c) The bacteria are all housed in nodules on the plant’s roots
(d) The enzyme nitrogenase produces ammonia from gaseous nitrogen
A plant that manufactures its own food is
(a) Autotroph
(b) Parasite
(c) Epiphyte
(d) Saprophyte
Woodward (1669) observed that plant grew better in muddy water than in rain water because
(a) Muddy water had most of essential elements dissolved in it
(b) Muddy water had micro-nutrients dissolved in it
(c) Muddy water had macro-nutrients dissolved in it
(d) None of these
Which of the following is not an essential micronutrient
(a) Boron
(b) Nickel
(c) Manganese
(d) Molybdenum
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Khaira disease of paddy is caused by
(a) MLO attack
(b) Viral attack
(c) Zn deficiency
(d) Mn deficiency
Active uptake of minerals by roots mainly depends on the
(a) Availability of oxygen
(b) Light
(c) Temperature
(d) Availability of carbon dioxide
Soil salinity is measured by
(a) Porometer
(b) Potometer
(c) Conductivity meter
(d) Calorimeter
Which of the following is a macro-nutrient
(a) Ca and Mg
(b) Mo
(c) Mn
(d) Zn
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Which is not a macroelement
(a) Calcium
(b) Nitrogen
(c) Potassium
(d) Zinc
Phosphorus and nitrogen ions generally get depleted in soil because they usually occur as
(a) Neutral ions
(b) Negatively charged ions
(c) Positively charged ions
(d) Both positively and negatively charged but disproportionate mixture
Nitrogen absorbed by plants is
(a) Converted to nitrate
(b) Reduced to ammonia
(c) Changed to nitrite
(d) Combined with oxygen
Presence of phosphorus in a plant
(a) Brings about healthy root growth
(b) Promotes fruit ripening
(c) Retards protein formation
(d) None of the above
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The element which is required in largest quantities by plants is
(a) Phosphorus
(b) Nitrogen
(c) Sulphur
(d) Calcium
Little leaf/leaf rosetting is deficiency symptom of
(a) Zn
(b) Mn
(c) Fe
(d) B
vWhich of the following is not a macro-nutrient
(a) Mn
(b) Ca
(c) Mg
(d) Phosphorus
Rotation of crops is essential for
(a) Getting different types of crops
(b) Increasing quantity of minerals
(c) Increasing fertility of the soil
(d) Increasing quantity of proteins
Phosphorus is present in
(a) Vitamin A
(b) Vitamin C
(c) Lecithin
(d) Glycin
Absence of Mg++ ions from plants tissue results in
(a) Plasmolysis
(b) Hydrolysis
(c) Chlorosis
(d) Necrosis
Which of the following element is a component of ferredoxin
(a) Cu
(b) Mn
(c) Zn
(d) Fe
All mineral salts are absorbed in cells as
(a) Ions
(b) Atoms
(c) Molecules
(d) All of these
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Which element is essential for root hair formation
(a) Ca
(b) Zn
(c) Cu
(d) Na
