CBSE Questions for Class 11 Medical Biology Mineral Nutrition Quiz 12 - MCQExams.com

Which one of the following is a free living nitrogen-fixing bacterium?
  • Rhizobium
  • Azotobacter
  • Nitrococcus
  • Both A and B
How many ATP molecules are needed to produce $$4$$ moles of $$NH_3$$ without release of the $$H_2$$ during symbiotic $$N_2$$ fixation by Rhizobium leguminosarum ________________.
  • $$32$$
  • $$24$$
  • $$16$$
  • $$12$$
Which of the following is a product of reductive amination?
  • Glutamine
  • Glutamate
  • Asparagine
  • Aspartic acid
$$N_2$$ fixation is?
  • $$N_2 \rightarrow NH_3$$
  • $$NO_3\rightarrow NO_2$$
  • $$N_2\rightarrow$$ Amino acid
  • Both $$(1)$$ and $$(2)$$
Morphogenetic changes are induced by CK in presence of 
  • NAA
  • IBA
  • IAA
  • TDZ
Ammonia produced following nitrogen fixation is incorporated into amino acids as the?
  • Amino group
  • Keto group
  • Carboxyl group
  • Hydroxyl group
Statements regarding Frankia are correct except:
  • Induction of stem nodules in many plant species.
  • Like Rhizobium, it infects the host through root hair and induces proliferation of the cortex.
  • Formed specialized vesicles in which nitrogenase are protected from oxygen by a chemical barrier involving triterpene hopanoids.
  • Can fix nitrogen in free state.
How many of the following mentioned are chief sinks for mineral elements ?
Apical meristems, Developing fruits, seeds mature leaves, Developing flowers, Lateral meristems, wood
  • 4
  • 6
  • 5
  • 3
Hydroponics is ________.
  • Growing of aquatic plants
  • Growing of floating aquatic plants
  • Growing of plant in sand
  • Growing of plants in aqueous nutrient medium
Select the total numbers of macronutrient from the following :
C, H, O, N, P, S, Cu, Zn, B, Cl, Mn, K, Ni, Ca, Mg, Mo
  • 8
  • 9
  • 10
  • 11
Select incorrect statement w.r.t. micronutrientc.
  • Become toxic in excess
  • Involved in activation of enzymes
  • Involved in building of protoplasmic constituents
  • Concentration is less than 10 millimole $$kg^{-1}$$ of dry matter
Which mycelial bacteria can fix $$N_2$$ symbiotically by root nodule formation in non- legume plants?
  • Casuarina
  • Nocardia
  • Frankia
  • Corynebacterium
Which of the following essential elements does terrestrial plants take exclusively from the air?
  • Nitrogen
  • Phosphorus
  • Potassium
  • Carbon
In which of the following, all three are micronutrients?
  • Iron, manganese, copper
  • Carbon, hydrogen, nitrogen
  • Zinc, boron, nitrogen
  • Copper, molybdenum, phosphorous
Select the incorrect statement.
  • Microelements involve N, P, Mn, Cu, Mo.
  • The concentration of microelements is $$10$$m mole/kg
  • If the concentration is more than $$10$$m mole/kg, they become toxic
  • The deficiency of microelements causes symptoms of disease
Symbiotic bacteria is not present in the nodules of : 
  • Gram plant
  • Rice plant
  • Sweet peas plant
  • Peas plant
Which group represent micronutrients?
  • Mn, Zn, Fe, B, Cl, Ni
  • C, S, O, N, K, Ca
  • Ca, Mg, K, S, P
  • C, H, Fe, Mn, Cu, Mo
Match the following concerning essential elements and their functions in plants: - 
(a)Iron(i)Photolysis of water
(b)Zinc(ii)Pollen germination
(c)
Boron(iii)Required for chlorophyll biosynthesis
(d)Manganese(iv)IAA biosynthesis
Select the correct option.
  • (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
  • (a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)
  • (a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)
  • (a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)
Micronutrients are needed in amounts equivalent to
  • 8m mole/kg of dry matter
  • 18m mole/kg of dry matter
  • 25m mole/kg of dry matter
  • 30m mole/kg of dry matter
Who recorded first mineral elements in plant cell?
  • Liebig
  • Woodward
  • Van Helmont
  • None of the above
One of the free-living anaerobic nitrogen-fixing bacteria is 
  • Azotobacter
  • Beijernickia
  • Rhodospirillum
  • Rhizobium
Which of the following red pigment is associated with bacteria, Rhizobium?
  • Phycoerythrin
  • Phycocyanin
  • Leghaemoglobin
  • Bacterioviridin
The association between ants and membrane of family rubiaceae is
  • Ornithophily
  • Entomophily
  • Myrmecophily
  • Anemophily
'Mycorrhizae' are useful for the plants mainly due to
  • Fixing atmospheric nitrogen
  • Enhanced absorption of nutrients from soil
  • Killing insects and pathogens
  • Providing resistance against abiotic stresses
Cruciferous plants when crushed emit a pungent smell. It is due to the presence of
  • Oxalic acid
  • Alkaloids
  • Iron compounds
  • Sulphur compounds
Match the following.
(A) Nitrobacter (i)  Free living aerobic nitrogen fixing organism
(B) Clostridium(ii)  Converts nitrite to nitrates
(C) Nitrosococcus  (iii) Converts ammonia to nitrite
(D) Azotobacter (iv)  Free living anaerobic nitrogen fixing organism
  • A- (iii), B- (iv), C- (ii), D- (i)
  • A- (i), B- (ii), C- (iii), D- (v)
  • A- (ii), B- (iv), C- (iii), D- (i)
  • A- (iv), B- (ii), C- (i), D- (iii)
All of the following statements concerning the actinomycetes filamentous soil bacterium, Frankia are correct except that Frankia
  • Can induce root nodules on many plant species
  • Cannot fix nitrogen in the free-living state
  • Like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host's cortex
  • Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids
The bacterium capable of anaerobic nitrogen fixation is
  • Azatobacter
  • Rhizobium
  • Bacillus
  • Clostridium
Ectomycorrhiza are commonly found on the roots of
  • Pinus
  • Eucalyptus
  • Quercus
  • All of the above
Which of the following is a flowering plant with nodules contain filamentous nitrogen-fixing microorganism?
  • Cicer arietinum
  • Casuarina equisetifolia
  • Crotalaria juncea
  • Cycas revoluta
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