CBSE Questions for Class 11 Medical Biology Mineral Nutrition Quiz 5 - MCQExams.com

The major portion of the dry weight of plants comprises of
  • Nitrogen, phosphorus and potassium
  • Calcium, magnesium and hydrogen
  • Carbon, nitrogen and hydrogen
  • Carbon, hydrogen and oxygen
Symbiotic microorganism is 
  • Clostridium
  • Azotobacter
  • Rhizobium
  • Chromatium
_______ nutrients are required in large quantity by plants are called _______.
  • Six, macronutrients
  • Five, macronutrients
  • Six, micronutrients
  • Five, micronutrients
Minerals required by a plant in small quantity are called as
  • Macronutrients
  • Micronutrients
  • Manures
  • Fertilizers
How many elements from the periodic table are essential for plants?
  • 15 elements
  • 11 elements
  • 12 elements
  • 17 elements
The largest reservoir of carbon is the 
  • Soil
  • Atmosphere
  • Ocean
  • Sedimentary rocks.
All the nitrogenase enzyme has been inactivated by radiation. There will be no ________________.
  • Fixation of atmospheric nitrogen
  • Fixation of nitrogen by leguminous plants
  • Conversion of nitrate to nitrite in legumes
  • Conversion of ammonia to nitrate in soil
Blue green algae fix ........... directIy from air to enhance fertility of soil.
  • Nitrogen
  • Oxygen
  • Ammonia
  • All of the above
Blue green algae fix ........... directly from air to enhance fertility of soil.
  • Atmospheric oxygen
  • Atmospheric nitrogen
  • Atmospheric sulfur
  • None of the above
Which one of the following is not an essential mineral element for plants while the remaining three are ?
  • Iron
  • Manganese
  • Cadmium
  • Phosphorus
In paddy fields biological nitrogen fixation is chiefly brought by ______________.
  • Cyanobacteria
  • Green algae
  • Mycorrhiza
  • Rhizobium
Hydroponics is growing plants in
  • Water
  • Soil culture
  • Solution of mineral nutrients
  • Tissue culture medium
The fixation of free nitrogen by bacteria in the soil  protein is only done by
  • Azotobacter
  • Nitrosomonas
  • Nitrobacter
  • Thiobacillus
Bacteria present in root nodules of the leguminous plants are
  • Rhizobium
  • Lactobacillus
  • Cyanobacteria
  • Azotobacter
Which of the following elements is almost non-essential for plants?
  • Ca
  • Mo
  • Zn
  • Na
Ecosystems obtain nitrogen from outside through the process of
  • Electrochemical fixation
  • Industrial fixation
  • Biological fixation
  • All of the above
Which of the following elements is not required for normal growth of the plant?
  • Pb
  • Ca
  • Fe
  • Mg
The chief sinks for the mineral elements are ______________.
  • Senescent leaves
  • Ripe fruits
  • Lateral meristems
  • Bark
Which among the following is a micronutrient?
  • Potassium
  • Phosphorus
  • Nitrogen
  • Cobalt
Which one is wrong statement?
  • Leghaemoglobin plays an important role in N$$_2$$ fixing bacteria
  • Plants absorb nitrate ions and converts it into N$$_2$$ for aminoacid synthesis
  • The cell organelle peroxisome plays an important role in photorespiration
  • Phosphoenolpyruvate carboxylase (PEP case) is the enzyme involved in C$$_4$$ cycle
Insectivorous plant grows only in soil deficient in:
  • Calcium
  • Phosphorus
  • Nitrogen
  • Copper
The major source of minerals in the soil is
  • Parent rock from which soil is formed
  • Plants
  • Animals
  • Decomposers
Hydroponics is 
  • Nutrient less culture
  • Water less culture
  • Soilless culture
  • None of the above
Which bacterium is capable of utilising the most abundantly available gas in the atmosphere for one of their metabolic pathways, but cannot utilise the second most abundantly available gas for another metabolic pathway?
  • Pseudomonas
  • Clostridium
  • Rhodomicrobium
  • Xanthomonas
Nodules with nitrogen fixing bacteria are found in
  • Cotton
  • Gram
  • Mustard
  • Wheat
The symbiotic nitrogen fixing bacterium in root nodules of legumes is
  • Pseudomonas
  • Bacillus
  • Rhizobium
  • Nitrobacter
Biological Nitrogen fixers

a) Able to fix nitrogen into salts of nitrogen
b) Able to fix nitrogen into usable forms
c) Able to convert nitrogen into nitrates
d) Able to convert nitrogen into nitrates only
  • a, b, c
  • a, c
  • b, c
  • a, b
Rhizobium found in root nodules of leguminous plants plays the role of
  • Atmospheric carbon dioxide fixation
  • Atmospheric oxygen fixaton
  • Atmospheric nitrogen fixation
  • All of the above
Identify the element which is an essential component of all the organic compounds in plants, but not absorbed from the soil
  • Nitrogen
  • Magnesium
  • Carbon
  • Phosphorus
Which of the following is a macronutrient?
  • Mn
  • Mg
  • Cu
  • Zn
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