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α- amylase activity by GA3 - Dormancy
Of the enzymes required for the digestion of starch α-amylase appears immediately after the start of germination. It was found that if the embryo was removed no a-amylase appeared, however, if very low concentations of GA3 were added to the seed the production of digestive enzyme proceeds. The work over the last 30 years proved the fact that GA3 initiates action at transcriptional and translational levels. Not only activation of pre-existing m-RNAs coding for a-amylase but synthesis of m-RNA also takes place after the exposure of seeds to GA3.
Cytokinins and Cell Division
Cell division involves synthesis of new DNA, RNA and a host of cell proteins in interphase (cell cycle S1 and S2). All these events are promoted by cytokinins. Cell division also means synthesis of a number of enzymes that are needed for the synthesis of cell wall and middle lamella.
Consider the case of a rare mutant in which the concentration of solutes in the kidney medulla interstitial spaces is equal to the concentration of solutes in the liquid in the lum
In mountain rabbits, the EL-1 gene is located on chromosome 3. Seven alleles of this gene have been identified in the population. With respect to EL-1, what is the maximum number o
Competence of Larval Tissue or Multiple Responses The responsiveness of different larval tissues to thyroxine is markedly different. The tissues of the tail becomes necrotic
what is the phylum protozoa and when he was discover
how to do assignment on alimentory canal
How different are oxyhemoglobin and hemoglobin? Where is it expected to find a higher concentration of oxyhemoglobin, in peripheral tissues or in the lungs? Oxygen-bound hemogl
Bovine leukemia Bovine leukemia, also known as bovine lymphosarcoma or leucosis, is a lymphoproliferative neoplastic disease of bovines. The virus belongs to genus Deltaretrov
In what way do chlorofluorocarbons (CFCs) cause global problems? Chlorofluorocarbons react with and deplete the ozone in the ozone layer. This permits more ultra-violet light f
What are the cells that produce the myelin sheath? Of which substance is the myelin sheath formed? In the central nervous system (CNS) the myelin sheath is made by apposition o
Figure shows the flow of energy through the trees in a forest ecosystem.The numbers represent inputs and outputs of energy in kilojoules per m 2 per year. (a) (i) On Figure,
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