CBSE Questions for Class 11 Medical Biology Mineral Nutrition Quiz 8 - MCQExams.com

Which one is a nitrogen fixer blue green algae?
  • Ulothrix
  • Anabaena
  • Ulva
  • Hydrodictyon
Macronutrients are elements that
  • Play major role in plant nutrition
  • Are required in large quantities in plants
  • Form large molecules in plants
  • None of the above
First experiments in hydroponics were performed by.
  • Sachs
  • Knop
  • Hoagland
  • Hill
Mineral requirement is studied through hydroponics which is related to growing plants in
  • Soil
  • Air
  • Solution
  • Ponds
Gene responsible for nitrogen fixation is
  • Nif
  • Nitrogenase
  • Yeast alanine tRNA synthetase
  • RNA synthetase
Yield of rice is enhanced by
  • Azolla
  • Anabaena
  • Nostoc
  • Clostridium
Which one is not a microelement for plants?
  • Cu
  • Zn
  • Cr
  • B
Nitrogen fixing symbiotic bacteria present in a legume root is
  • Azotobacter
  • Rhizobium
  • Nitrobacter
  • Nitrosomonas
Bacteria that convert ammonia to nitrite belong to
  • Nitrobacter
  • Nitrosomonas
  • Pseudomonas
  • Mycobacterium
Nitrifying bacteria convert
  • Nitrate to nitrogen
  • Ammonia to nitrogen
  • Nitrogen into soluble form
  • Ammonia to nitrate
Non-mineral essential elements are:
  • Carbon, Hydrogen and Oxygen
  • Hydrogen, Nitrogen and Sulphur
  • Hydrogen, Nitrogen and Fluorine
  • Chlorine, Fluorine and Nitrogen
Azolla has a symbiotic relationship with
  • Chlorella
  • Anabaena
  • Nostoc
  • Tolypothrix
An anaerobic bacterium capable of nitrogen fixation is
  • Chlorobium
  • Rhodospirillum
  • Clostridium
  • All of the above
Enzyme nitrogenase is required for.
  • Nitrification
  • Nitrite reduction
  • Nitrate reduction
  • Nitrogen fixation
Free living bacteria that can fix N$$_2$$ in soil are
  • Azotobacter
  • Beijerinckia
  • Clostridium
  • All the above
Match the columns and select the correct option.
Column IColumn II
aCalcium$$1$$.Chlorotic yerns
bpotassium$$2$$.Delayed germmation of seeds
cZinc$$3$$.Nicrosis of young leaves
dIron$$4$$.Scorched leaf tip
ePhosphorus$$5$$.Malformed leaves
  • $$a3, b-1, c-5, d-2, e-4$$
  • $$a-1, b-4, c-5, d-3, e-2$$
  • $$a-2, b-3, c-4, d-1, e-5$$
  • $$a-3, b-4, c-5, d-1, e-2$$
  • $$a-4, b-2, c-1, d-3, e-5$$
Nitrogen fixation of Rhizobium occurs inside
  • Soil
  • Rhizosphere association
  • Foliar association
  • Nodulated roots
Which is incorrect about ion channels?
  • They are proteins
  • All ions pass through same channel
  • Movement through them is simple diffusion
  • Movement through them is from high to low concentration
Free living nitrogen fixing aerobic bacterium is
  • Rhodospirillum
  • Anabaena
  • Nostoc
  • Beijerinckia
  • Rhizobium
Zn, Cu, Fe and Mo are examples of
  • Macronutrients
  • Non-essential elements
  • Trace elements
  • None of the above
Which is not a free living nitrogen fixing bacterium?
  • Azotobacter
  • Rhizobium
  • Bacillus
  • Rhodospirillum
Where do bacteroids occur?
  • Leaves
  • Root nodules
  • Stem
  • Flower
The process of conversion of nitrogen to ammonia by microbes is?
  • Nitrification
  • Denitrification
  • Nitrogen fixation
  • Haber's process
Match the columns and choose the correct answer.
III
(p)Thiobacillus(i)Nitrogen fixation
(q)Nitrosomonas(ii)Ammonification
(r)Azotobacter(iii)Nitrification
(s)Clostridium(iv)Denitrification
  • p-iv, q-iii, r-i, s-ii
  • p-iii, q-v, r-i, s-ii
  • p-iv, q-ii, r-i, s-iii
  • p-ii, q-i, r-iii, s-iv
Match the columns and choose the correct combination.
I(Essential Elements)II(Deficiency Causes)
(a)N, K, Mg, S, Fe, Mn, Zn and Mo(i)Inhibit cell division
(b)N, K, S and Mo(ii)Necrosis
(c)Ca, Mg, Cu and K(iii)Delay in flowering
(d)N, S and Mo(iv)Chlorosis
  • a - iv, b - iii, c - ii, d - i
  • a - i, b - ii, c - iii, d - iv
  • a - iv, b - i, c - ii, d - iii
  • a - ii, b - iii, c - iv, d - i
  • a - ii, b - iv, c - ii, d - i
During symbiotic nitrogen fixation, how many ATPs are used in fixing one mole of $$N_2$$.
  • $$8$$
  • $$16$$
  • $$5$$
  • $$10$$
Which of the following bacterium causes denitrification?
  • Azotobacter
  • Nitrobacter
  • Nitrosomonas
  • Pseudomonas
Criteria of essentiality of nutrients in plants were given by ______.
  • Stahl $$(1923)$$
  • Benedict $$(1927)$$
  • Arnon $$(1938)$$
  • Sachs $$(1860)$$
For proper growth of a plant, the elements required in minute quantity as compared to other elements are known as
  • Micronutrients
  • Essential elements
  • Necessary elements
  • Both A and B
Which of the following is not a role played by Potassium in plant growth?
  • Translocation of carbohydrates
  • Maintaining anion-cation balance
  • Opening and closing of stomata
  • Synthesis of proteins
  • Maintaining turgidity of cells
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