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Zinc (Zn) - Micronutrients
In its function in some enzyme systems, zn2+ resembles Mn2+ in that it brings about substrate binding and conformational changes in enzymes. A number of enzymes are thus activated in more or less the same way by Mn2+, Mg2+, or zn2+. Zn is actively involved in the N metabolism of the plant.
In Zn deficient plants, protein synthesis and protein levels are markedly lowered, and amino acids and amides accumulate. Zn deficiency affects protein metabolism through the inactivation of RNA polymerase. It affects structural integrity of ribosomes, and enhances RNA degradation by increasing RNase activity. Zn is also required for the synthesis of indole acetic acid from tryptophan.
Lateral Roots - Root Apex Lateral roots normally arise at a definite distance behind the tip from areas close to or opposite the points of xylem star. So, a triarch root can
2. Describe the respiratory organs and mechanism of respiration in pila.
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Explain Components of second heart sounds? The first component of S 2 is due to closure of aortic valve (A,). The second component is due to closure of pulmonary valve (P 2 ).
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Explain the Occurrence of Nictoinic acid Nictoinic acid occurs widely in the animal and vegetable kingdom in free as well as in bound form (in enzymes). Several animal organs
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