CBSE Questions for Class 11 Medical Biology Mineral Nutrition Quiz 13 - MCQExams.com

Root and stem nodules fixing atmospheric nitrogen are found in
  • Vigna sinensis
  • Sesbania aculeata
  • Melilotus parviflora
  • Sesbania rostrata
The role of individual mineral element in plant body has been determined by growing plants with their roots immersed in nutrient solution without soil. This technique is called as
  • Hydroponics
  • Photolysis
  • Bulk method
  • Bagging
  • Hypostatic
Choose the correct matching set from the following.
 List I   List II
 A $$Azospirillum$$ and $$Azotobacter$$ 1 Free living nitrogen fixing bacteria
 B $$Glomus$$ 2 Biological control tools
 C $$Anabaena$$ and $$Nostoc$$ 3 Forms mycorrhiza
 D $$Nucleopolyhedro$$ $$virus$$ 4 Symbiotic cyanobacteria
  • A- 1, B- 3, C- 4, D- 2
  • A- 2, B- 3, C- 4, D- 1
  • A- 3, B- 4, C- 2, D- 1
  • A- 4, B- 2, C- 3, D- 1
Manganese is a micronutrients.
  • True
  • False
Who reported the presence of associative nitrogen fixing bacteria with the roots of maize plants?
  • P. K. De
  • G. C. Fogg
  • J. Doberiner
  • N. J. Borlaug
Nif gene is found in
  • Pseudomonas
  • Salmonella
  • Rhizobium
  • Mycobacterium
There are __ nutrients which are essential for plants.
  • Five
  • Fourteen
  • Seventeen
  • Twenty
Refer the given passage and answer the following question.

At present the primary nutrient which limits the agricultural yield is nitrogen (N), Some plants are capable to produce more N$$_2$$ than they consume. These plants show a symbiotic relationship with N$$_2$$ - fixing bacteria such as Rhizobium. These bacteria produce root nodules in leguminous plants and convert atmospheric N$$_2$$ is not nitrogenous compounds. Rhizobium bacteria are gram-negative bacteria. Which show host specificity and fix N$$_2$$ in the presence of a red pigment called leghaemoglobin. It protects nitrogen-fixing enzyme nitrogenase from oxygen. 

Which of the following statements is incorrect?
  • Leghaemoglobin functions as oxygen scavenger during $$N_2$$ - fixation.
  • The enzyme nitrogenase, which is required to fix atmospheric $$N_2$$ is active in the presence as well as the absence of oxygen.
  • N, P, and K are referred to as critical elements for crop plants as they easily become deficient in soil due to higher plant requirement and repeated cultivation.
  • The coordinated activities of the legume and Rhizobium bacteria depends on the chemical interaction between the symbiotic partners.
An association which fixes nitrogen through non-nodulation is
  • Maize roots with Spirillum notatum
  • Digitaria roots with Spirillum notatum
  • Coralloid roots of Cycas with Anabena
  • All of the above
Single filament of Nostoc with mucilage sheath is called as 
  • Colony
  • Mycelium
  • Trichome
  • Hyphae
Which of the following contains macronutrients only?
  • Calcium, sulphur and zinc
  • Nitrogen, potassium and phosphorus
  • Calcium, magnesium and copper
  • Nitrogen, iron and chlorine
Essential elements which are required in plants in traces (equal or less than $$0.1   {mg}/{gm}$$ of dry matter) are called as
  • Micro nutrients
  • Macro nutrients
  • Minerals
  • Non mineral elements
Identify the role of lectins in the formation of root nodules in legumes. 
  • Recognition of compatible Rhizobium by host.
  • Formation of peribacteroid membrane.
  • Formation of infection thread.
  • Formation of shepherd's crook.
Rhizobium phaseoli fixes atmospheric nitrogen symbiotically in 
  • Peas
  • Beans
  • Jowar
  • Maize
The plasmid of which one of the following has 'Nif' gene in it?
  • Rhizobium
  • Agrobacterium tumefaciens
  • Bacillus thuringiensis
  • Salmonella typhimurium
Statements regarding Frankia are correct, except
  • Induction of root nodules in many plant species.
  • Like Rhizobium, it infects host through root hair and induces proliferation of cortex.
  • Form specialized vesicles in which nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids.
  • Cannot fix nitrogen in free state.
Nostoc fixes nitrogen in the symbiotic association of the following.
Alnus
Gunnera
Anthoceros
Casuarina
The correct combination is
  • $$1$$ and $$2$$
  • $$1$$ and $$3$$
  • $$1$$ and $$4$$
  • $$2$$ and $$3$$
A filamentous nitrogen fixing bacterium is present in root nodules of flowering plants is
  • Cicer arietinum
  • Casuarina equisetifolia
  • Cycas revoluta
  • Crotalaria juncea
Match the column.

List IList II
A. Nitrosomonas
 I. Dentrifying bacteria
B. Nitrobacter
II. Soil bacteria
C. Psuedomonas
III. Nitrate bacteria
D. Azotobacter
IV. Nitrite bacteria
  • A- IV, B- III, C- I, D- II
  • A- I, B- II, C- IV, D- III
  • A- IV, B- III, C- II, D- I
  • A- II, B- III, C- I, D- IV
Match the columns.
III
aAerobic$$1$$.Frankia
bCyanobacteria$$2$$.Azospirillum
c.Casuarina$$3$$.Clostridum
d.Tropical grasses$$4$$.Aulosira
$$5$$.Azotobacter
  • $$a-4, b-3, c-2, d-1$$
  • $$a-5, b-3, c-4, d-1$$
  • $$a-5, b-4, c-1, d-2$$
  • $$a-3, b-5, c-4, d-2$$
  • $$a-2, b-1, c-3, d-5$$
Critical elements are
  • Na, K and Ca
  • N, P and Mg
  • N, P and K
  • Mn, B and Mo
Which one group is of micro-elements?
  • Mn, Cu, Ca
  • Na, K, B
  • Na, Ni, Cl
  • Cu, Mo, Zn, Mn, Fe
Scientist credited with development of formula for balanced solution of mineral elements is?
  • Knop
  • Went
  • Hill
  • Emerson
Buds typically occur at
  • Leaf bases
  • Leaf axils
  • Tips of stems and roots
  • Tips of branches and leaf bases
What is required for nitrogen fixation by Rhizobium?
  • $$CO_2$$
  • $$O_2$$
  • Heterocyst
  • Potassium
Nitrogen fixing organism in the nodules of Trifolium alexandrinum is?
  • Oscillatoria
  • Lingbya
  • Aulosira
  • Nostoc
Conversion of ammonia to nitrite by microbe is?
  • Nitrification
  • Nitrogen fixation
  • Eutrophication
  • Denitrification
In which of the following all three are macronutrients?
  • Nitrogen, Potassium, Phosphorous
  • Boron, Zinc, Manganese
  • Iron, Copper, Molybdenum
  • Molybdenum, Magnesium, Manganese
The cluster of genes, which regulate nodulation of legume, possess host specificity and are responsible for nitrogen fixation are
  • Nod genes
  • Nil genes
  • Nod and Nil genes
  • None a these
Hydroponics is growing of plants 
  • Without soil.
  • Without organic matter.
  • In water.
  • All of the above.
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