CBSE Questions for Class 11 Medical Biology Mineral Nutrition Quiz 1 - MCQExams.com

Number of essential nutrients needed by plants is?
  • $$5$$
  • $$8$$
  • $$16$$
  • $$4$$
Which of the following are macronutrients?
  • Carbohydrates
  • Proteins
  • Both A and B
  • Vitamins
Coralloid roots help the plant in
  • Absorption of water
  • Fixation of nitrogen
  • Anchorage
  • Respiration
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
  • Assertion is correct but Reason is incorrect.
  • Both Assertion and Reason are incorrect.
Which enzyme complex is responsible for the reduction of molecular nitrogen to the level of $$NH_3$$ in root module of legume?
  • Aminase
  • Nitrogenase
  • Nitrate reductase
  • Nitrite reductase
Carbon is available to crop plants in the form of
  • Amino acids
  • Carbonates
  • Carbon dioxide
  • Element carbon
The first stable product of fixation of atmospheric nitrogen in leguminous plants is
  • $$NO_{2}^{-}$$
  • Ammonia
  • $$NO_{3}^{-}$$
  • Glutamate
Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct during this process of nitrogen fixation?
  • Nitrogenase is insensitive to oxygen.
  • Leghaemoglobin scavenges oxygen and is pinkish in colour.
  • Nodules act as sites nitrogen fixation.
  • The enzyme nitrogenase catalyses the conversion of atmospheric $$N_2$$ to $$NH_3$$.
The most abundant element present in the plants is
  • Carbon
  • Nitrogen
  • Manganese
  • Iron
The enzyme responsible for atmospheric nitrogen fixation is
  • Nitrogenase
  • Hydrogenase
  • Oxygenase
  • Carboxylase
Certain bacteria living in the soil poor in oxygen, convert nitrates into nitrites and then to free nitrogen and such bacteria are termed as
  • Nitrogen fixing bacteria
  • Denitrifying bacteria
  • Ammonifying bacteria
  • Saprophytic bacteria
Non-essential element in plant is
  • Barium
  • Magnesium
  • Potassium
  • Calcium
Technique of growing plants without soil in nutrient solution is called
  • Parthenogenesis
  • Hydroponics
  • Aquaculture
  • Tissue culture
A trace element is an element which
  • Is a radioactive and can be traced by geiger counter
  • Is required in very minute amounts
  • Draws other element out of protoplasm
  • Was one of the first to be discovered in protoplasm
Nodules with nitrogen fixing bacteria are present in
  • Cotton
  • Gram
  • Wheat
  • Mustard
In nature, organic compounds invariably contain
  • Carbon
  • Phosphorus
  • Sulphur
  • Magnesium
The most abundant element present in the plant is
  • Manganese
  • Iron
  • Carbon
  • Nitrogen
Essential elements are
  • Absorbed from soil
  • Manufactured during photosynthesis
  • Produced by enzymes
  • Produced by growth horomones
Micro-nutrients are
  • Less important in nutrition than macro-nutrients
  • As important in nutrition as macro-nutrients
  • May be omitted from culture media without any detrimental effect on the plant
  • Called micro because they play only minor role in nutrition
Frame work element in plants are
  • Magnesium, copper and iron
  • Copper, carbon and oxygen
  • Magnesium, calcium and nitrogen
  • Carbon, hydrogen and oxygen
Produce from the hydroponic method have
  • Short shelf life.
  • Long shelf life.
  • No shelf life.
  • None of the above.
Which of the following functions is associated with Nostoc?
  • Photosynthesis
  • Transpiration
  • Nitrogen fixation
  • Carbon fixation
Plants absorb carbon dioxide from
  • Millets
  • Cereals
  • Carbohydrates present in the soil
  • Atomosphere
Which of the following crops would enrich the soil with nitrogen?
  • Apple
  • Pea
  • Sunflower
  • Potato
Which of these plants contains nitrogen-fixing bacteria?
  • Gram
  • Wheat
  • Mustard
  • Cotton
Gravel method of hydroponics is called as
  • Solid medium culture
  • Hydroculture
  • Nutriculture
  • None of these
Which one of the following can utilize molecular nitrogen $$(N_{2})$$ as nutrient for growth?
  • Rhizobium
  • Spirogyra
  • Mucor
  • Methancoccus
Culturing of plants in water$$/$$ soil-less medium is
  • Hydroponics
  • Sand culture
  • Aeroponics
  • Soil-less culture
Number of elements needed for healthy growth and development of plants is
  • $$16$$
  • $$24$$
  • $$34$$
  • $$10$$
Number of essential elements in plants is
  • $$10$$
  • $$17$$
  • $$20$$
  • $$22$$
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