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Cytokinins - Plant Growth Substances
Folke Skoog observed that the cell division or differentiation is affected by AMP and other purines. A nucleic acid from yeast was also found to be useful or effective. Isolation efforts from yeast t-RNA using the differentiation of tobacco tumor cultures as a bioassay have lead to the discovery of kinetin or 6-furfury aminopurine. Lethan and others isolated another cytokinin zeatin from corn plants. Today, we know quite a few types of natural and synthetic cytokinins. We call them cytokinins because they essentially promote cell division. Other effects of cytokinins are retardation of senescence, development of buds in moss protonema, release of inhibiters from buds.
Pregnancy toxaemia in sheep (twin lamb disease, sleeping ewes disease, pregnancy ketosis). Pregnancy toxaemia is a multifactor disorder of energy metabolism affecting sheep du
In a population of 200, 90 are homozygous dominant, 40 are heterozygotes, and 70 are homozygous recessive for a particular trait. What do you expect the frequencies of the dominant
Q. Explain about Malnutrition Related Diabetes Mellitus? This type of diabetes has been categorized as a separate entity. 'if is 'Men seen commonly in developing countries, 1n
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Explain transposition with VSD with restricted pulmonary? Transposition of great arteries with VSD with restricted pulmonary blood flow: Restriction to pulmonary blood flow
Where in the plants is a large amount of IAA found? The Auxins are produced and found in large amount in the apical buds of the shoots and stem and in the young leaves.
Does every amino acid have a central carbon? To which organic group is that central carbon bound? A carboxyl group -COOH, an amine group - NH 2 , an atom of hydrogen -H and a v
Define about the Polyphenols? We now come to a group of compounds, which were until recently considered to adversely influence nutrient absorption or giving colour to foods e.g
PHYSIOLOGY OF EXCRETION - 1 . FORMATION OF UREA - It takes place in liver. (i) Deamination (ii) Ornithine cycle or urea cycle - Explained by H.
how does sodium and potassium ions maintain the resting petential of neurons
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