CBSE Questions for Class 11 Medical Biology Mineral Nutrition Quiz 2 - MCQExams.com

Root nodules are found in
  • Some leguminous plants only
  • In all plants
  • Some leguminous plants and some other plants also
  • All leguminous plants but never in other plants
Which one does not fix nitrogen?
  • Azotobacter
  • Spirogyra
  • Anabaena
  • Nostoc
Which combination of micro and macronutrients is correct?
  • Cu, Fe, K, P; B, Zn, Mo, N
  • Cu, K, P, B; Fe, N, Mo, Ca
  • Cu, Zn, B, Mo; N, P, K, S
  • B, Fe, K, Zn; P, K, Mn and Mo
Non-symbiotic nitrogen fixing prokaryote is
  • Rhizobium
  • Nostoc
  • Frankia
  • Azotobacter
The most abundant element found in plants is
  • Carbon
  • Nitrogen
  • Iron
  • Manganese
In plants, micronutrients are those which are needed less than or equal to the following amount per gram of dry matter is
  • $$0.1$$mg
  • $$0.1$$g
  • $$0.1\mu$$g
  • $$1\mu$$g
The macronutrients which is essential component of all organic compounds but is not obtained by plants from soil is
  • Nitrogen
  • Phosphorus
  • Magnesium
  • Carbon
Micronutrients are needed in amounts
  • $$8$$m mole$$/$$kg dry matter
  • $$18$$m mole$$/$$kg dry matter
  • $$25$$m mole$$/$$kg dry matter
  • $$30$$m mole$$/$$kg dry matter
Which of the following is not non-essential element for plants?
  • Potassium
  • Sodium
  • Aluminium
  • Cobalt
Microelements are the minerals which occur in plants in concentration of.
  • More than $$1$$ mg/gm of plant body
  • More than $$1$$ mg/gm of dry matter
  • Less than $$1$$ mg/gm of plant body
  • Less than $$1$$ mg/gm of dry matter
Which is a free living nitrogen fixing bacterium?
  • Pseudomonas
  • Azotobacter
  • Nitrosomonas
  • Rhizobium
Micronutrients are
  • Mn, Ni, Zn
  • Mg, Mn, Mo
  • Cu, B, O
  • Ca, S, Fe
Hydroponics is growing plants
  • Without soil
  • Without organic matter
  • In water
  • All the above
Which of the following microbes produces nitrogen fixing nodules in non leguminous plants?
  • Rhizobium
  • Frankia
  • Azotobacter
  • Pseudomonas
Which of these is a free living aerobic and anaerobic nitrogen-fixing bacteria respectively?
  • Rhizobium, Clostridium
  • Azotobacter, Clostridium
  • Azotobacter, Agrobacterium
  • Agrobacterium, Clostridium
Enzyme required for nitrogen fixation is
  • Nitrogenase
  • Nitroreductase
  • Transaminase
  • Transferase
Chlorosis, i.e., loss of chlorophyll leading to yellowing in leaves, is caused by the deficiency of 
  • N, K, Mg
  • S, Fe, Zn
  • Mn, Mo, Mg
  • All of these
Which of the following are macronutrients?
  • Carbon, nitrogen
  • Oxygen, phosphorus
  • Potassium, sulphur
  • All of these
Which of the following is a free-living nitrogen fixing bacterium present in the soil?
  • Azotobacter
  • Nitrosomonas
  • Rhizobium
  • Pseudomonas
Identify the plant among these, having nitrogen fixing bacteria
  • Cotton
  • Wheat
  • Gram
  • Mustard
Deficiency symptoms of radially mobilised essential elements will first appear in _________
  • Younger tissues
  • Older tissues
  • Roots
  • Shoots
Necrosis mainly occurs by the deficiency of  
  • Ca, Mg
  • N, S
  • Mn, Mo
  • Fe, Mn
Yellowish edges appear in leaves deficient in
  • Potassium
  • Calcium
  • Magnesium
  • Phosphorus
The ability of coralloid roots to fix atmospheric nitrogen is due to the presence of
  • Blue-green algae
  • Mycorrhiza
  • Rhizobium
  • None of these
Premature leaf fall is due to deficiency of 
  • Sodium
  • Potassium
  • Zinc
  • Phosphorus
If, by radiation, all nitrogenase enzyme are inactiveted, then there will be no
  • Fixation of nitrogen in legumes
  • Fixation of atmospheric nitrogen
  • Conversion from nitrate to nitrate in legumes
  • Conversion from ammonium to nitrate in soil
Azolla pinata has been found to be an important biofertiliser for paddy crops. This quality is due to the presence of :
  • $$N_2$$ fixing bacteria
  • $$N_2$$ fixing cyanobacteria
  • Mycorrhizae
  • All of these
Identify the given type of hydroponic technique and select the correct option.
887286_a452fe9c8dbc40c4becb70386103cdf1.png
  • A very shallow stream of water containing dissolved nutrients is recirculated past the roots of plants in a watertight channel.
  • The nutrient solution flows in a thin film over the roots ensuring that the upper part of the roots gets sufficient supply of oxygen.
  • Roots keep suspended in the air over the nutrient solution which is provided in the form of a nutrient mist.
  • Both (a) and (b)
You observed that a plant's younger leaves, not the older ones, are yellowing. You recall that the cause of plant sickness can be diagnosed by which leaves are yellowing.
What is the most likely cause of your plant's blight?
  • Too much shade
  • Lack of nitrogen-fixing Rhizobium bacteria
  • A deficiency in a mobile mineral nutrient.
  • A deficiency in a non-mobile mineral nutrient.
Mineral and vitamins are called___________.
  • Macronutrients
  • Micronutrients
  • Carbohydrates
  • Both A and B
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 11 Medical Biology Quiz Questions and Answers