An immobile element in plants is
The deficiency symptoms tend to appear first in the young tissues whenever the elements are relatively immobile and are not transported out of the mature organs. Example, calcium.
The requirement of micro nutrient are always low if the concentration increases it leads to
The requirement of micronutrients is always in low amounts while their moderate decrease causes the deficiency symptoms and a moderate increase causes toxicity.
Amino acid derivatives in which –OH component of carboxylic group is replaced by another amino group are called
Amides are obtained from the replacement of –OH component of carboxylic group of amino acid by another amino group
Non-symbiotic nitrogen fixing prokaryote is
Most of the prokaryotic nitrogen fixing prokaryotes are symbiotic in nature. Azatobacter is bacteria is non-symbiotic nitrogen fixing prokaryote.
The enzyme involved in biological nitrogen fixation are
The conversion of atmospheric nitrogen to ammonia by nitrogenase enzyme complex found in nitrogen-fixing bacteria(biological nitrogen fixation).
Magnesium is component of
It is absorbed by plants in the form of divalent Mg2+.Magnesium is a constituent of the ring structure of chlorophyll and helps to maintain the ribosome structure.
The excess of manganese may induce deficiency in
Excess of manganese may, in fact, induce deficiencies of iron, magnesium and calcium. Thus, what appears as symptoms of manganese toxicity may actually be the deficiency symptoms of iron, magnesium and calcium.
Mineral absorption into the plant is always against the concentration gradient and use ATP as source of energy, it is an / a
Mineral absorption into the plant is always against the concentration gradient and use ATP molecules as source of energy is an active process. As concentration of minerals are always higher in cell than soil.
Main role of minor elements is to act as
Micronutrients are required in very small quantity. The main role of micronutrients is to act as cofactor of enzyme. Co-factors increase the efficiency of enzymes.
Choose the odd one out among the following (on the basis of nitrifying and denitrifying bacteria)
Except pseudomonas all other bacteria are free living, nitrogen fixing microbes.
Psedomonas is an denitrifying bacteria while remaining three are nitrifying bacterias
Which element essential for photolysis of water?
Chlorine is absorbed in the form of chloride anion (Cl–). Along with it Na+ and K+, it helps in determining the solute concentration and the anioncation balance in cells. It is essential for the water-splitting reaction in photosynthesis.
The cupric ions are essential for
Copper is absorbed as cupric ions (Cu2+)which are essential for the overall metabolism in plants.
Which one is prerequisite for nitrogen fixation?
During nitrogen fixation atmospheric nitrogen is converted into nitrates and nitrites. When deficiency of nitrate occurs in soil, nitrogen fixation occurs. So, nitrate deficiency is prerequisite for nitrogen fixation.
Which one of the following mineral elements plays an in biological nitrogen fixation?
Which among the following is NOT the source of nitrogen?
The xylem is the part of plant which conducts water from one location to another. But all the others are sources of nitrogen.
Phosphorous is a constituent of A.Cell membrane B.Nucleic acids C.cellwallD.chlorophyll
Phosphorus is a constituent of cell membranes, certain proteins, all nucleic acids and nucleotides
Element that is necessary for controlling metabolic activities is
Calcium activates certain enzymes and plays an important role in regulating metabolic activities.
Analysis of xylem sap shows
Mineral salts are translocated through xylem along with the ascending stream of water, which is pulled up through the plant by transpirational pull.
Grey spots of Oat are due to deficiency of
Manganese deficiency in Oat appear as grey spots on leaves of oat. Rate of photosynthesis is also influenced by the Manganese elements.
During the development of root nodule in soya bean. The cells lead to formation of root nodules in
Infected thread carries the bacteria tothe inner cortex. The bacteria get modified into rod-shaped bacteroidsand cause inner cortical and pericycle cells to divide. Division and growth of cortical and pericycle cells lead to nodule formation.
Chlorosis is referred as
Chlorosis is the loss of chlorophyll leading to yellowing in leaves. This symptom is caused by the deficiency of elements. N, K, Mg, S, Fe, Mn, Zn and Mo.
The morphological changes are indicative ofcertain element deficiencies and are called
Explanation:The morphological changes are indicative of certain element deficiencies and are called deficiency symptoms.
Function of laghaemoglobin during biological nitrogen fixation in root nodules of legumes is to
During biological nitrogen fixation in root nodules of legumes, laghaemoglobin provide protect the nitrogenase from Oxygen.
Sulphur is important nutrient for optimum growth and productivity of
Sulphur is most important nutrient for optimum growth and productivity of Pulses.
Biological nitrogen fixation was discovered by
Sergei Winogradsky discovered the biological nitrogen fixation during which atmospheric nitrogen is converted into nitrates and nitrite.