Mineral nutrition (5 Feb) - Live Session - NEET 2020Contact Number: 9667591930 / 8527521718Mineral nutrition (5 Feb) - Live Session - NEET 2020Contact Number: 9667591930 / 8527521718In which of the following forms is iron absorbed by plants?
(1) Ferric
(2) Ferrous
(3) Both ferric and ferrous
(4) Free element
Which of the following elements is responsible for maintaining turgor in cells?
(1) Magnesium
(2) Sodium
(3) Calcium
(4) Potassium
Which is essential for the growth of root tip?
(1) Zn
(2) Fe
(3) Ca
(4) Mn
In which of the following all three are macronutrients?
(1) Nitrogen, sulphur, phosphorus
(2) Boron, zinc, manganese
(3) Iron, copper, molybdenum
(4) Molybdenum, magnesium, manganese
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by:
(1) Cytochrome
(2) Leghaemoglobin
(3) Xanthophyll
(4) Carotene
Minerals known to be required in large amounts for plant growth include
(1) Magnesium, sulphur, iron, zinc
(2) Phosphorus, potassium, sulphur, calcium
(3) Calcium, magnesium, manganese, copper
(4) Potassium, phosphorus, selenium, boron
Deficiency symptoms of nitrogen and potassium are visible first in
(1) Senescent leaves
(2) Young leaves
(3) Roots
(4) Buds
The first stable product of fixation of atmospheric nitrogen in leguminous plants is:
(1) Ammonia
(2)
(3) Glutamate
(4)
Which one of the following is the wrong statement?
(1) Phosphorus is a constituent of cell membranes, certain nucleic acids, and all proteins
(2) Nitrosomonas and Nitrobacter are chemoautotrophs
(3) Anabaena and Nostoc are capable of fixing nitrogen in the free-living state also
(4) Root nodule forming nitrogen fixers live as aerobes under free-living conditions
Which one of the following is correctly matched ?
(1) Potassium – Readily mobilization
(2) Bakane of rice seedings – F.Skoog
(3) Passive transport of nutrients – ATP
(4) Apoplast – Plasmodesmata
For its action, nitrogenase requires
(1) High input of energy
(2) Light
(3)
(4) Super oxygen radicals
Best defined function of Manganese in green plants is
(1) Nitrogen fixation
(2) Water absorption
(3) Photolysis of water
(4) Calvin cycle
Nitrifying bacteria
(1) Reduce nitrates to free nitrogen
(2) Oxidize ammonia to nitrates
(3) Convert free nitrogen to nitrogen compounds
(4) Convert proteins into ammonia
The function of leghaemoglobin in the root nodules of legumes is
(1) Expression of nif gene
(2) Inhibition of nitrogenase activity
(3) Oxygen removal
(4) Nodule differentiation
Which one of the following elements in plants is not remobilized?
(1) Sulphur
(2) Phosphorus
(3) Calcium
(4) Potassium
A prokaryotic autotrophic nitrogen-fixing symbiont is found in
(1) Pisum
(2) Alnus
(3) Cycas
(4) Cicer
Which one of the following helps in the absorption of phosphorus from the soil by plants?
(1) Anabaena
(2) Glomus
(3) Rhizobium
(4) Frankia
Which one of the following is essential for the photolysis of water?
(1) Copper
(2) Boron
(3) Manganese
(4) Zinc
Which one of the following is not an essential mineral element for plants while the remaining three are?
(1) Cadmium
(2) Phosphorus
(3) Iron
(4) Manganese
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?
(1) Leghaemoglobin scavenges oxygen and is pinkish in colour
(2) Nodules act as sites for nitrogen fixation
(3) The enzyme nitrogenase catalyses the conversion of atmospheric
(4) Nitrogenase is insensitive to oxygen
An element playing an important role in nitrogen fixation is
(1) Molybdenum
(2) Copper
(3) Manganese
(4) Zinc
The common nitrogen-fixer in paddy fields is
(1) Frankia
(2) Rhizobium
(3) Azospirillum
(4) Oscillatoria
Which one of the following is not a micronutrient?
(1) Boron
(2) Molybdenum
(3) Magnesium
(4) Zinc
One of the free-living, anaerobic nitrogen-fixer is
(1) Azotobacter
(2) Beijernickia
(3) Rhodospirillum
(4) Rhizobium
Manganese is required in
(1) Plant cell wall formation
(2) Photolysis of water during photosynthesis
(3) Chlorophyll synthesis
(4) Nucleic acid synthesis
Nitrogen fixation in root nodules of Alnus is brought about by
(1) Azorhizobium
(2) Bradyhizobium
(3) Clostridium
(4) Frankia
Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism?
(1) Cicer arietinum
(2) Casuarina equisetifolia
(3) Crotalaria juncea
(4) Cycas revolute
Which one of the following elements is not an essential micronutrient for plant growth?
(1) Ca
(2) Mn
(3) Zn
(4) Cu
Which one of the following statements is correct?
(1) At present, it is not possible to grow maize without chemical fertilizers.
(2) Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies.
(3) Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.
(4) Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and potassium for plant nutrition in the soil.
A plant requires magnesium for:
(1) Cell wall development
(2) Holding cells together
(3) Protein synthesis
(4) Chlorophyll synthesis
About 98 per cent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and:
(1) Calcium and phosphorous
(2) Phosphorus and sulphur
(3) Sulphur and magnesium
(4) Magnesium and sodium
Sulphur is an important nutrient for optimum growth and productivity in
(1) Pulse crops
(2) Cereals
(3) Fibre crops
(4) Oilseed crops
The deficiencies of micro-nutrients, not only affects the growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport?
(1) Cu, Mn, Fe
(2) Co, Ni, Mo
(3) Mn, Co, Ca
(4) Ca, X, Na
Which of the following elements is a constituent of biotin?
(1) Sulphur
(2) Magnesium
(3) Calcium
(4) Phosphorus
Which one of the following elements is almost non-essential for plants?
(1) Zn
(2) Na
(3) Ca
(4) Mo