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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.
Q. How does the sexual arousal mechanism in women facilitate fecundation? During sexual arousal in women the vagina secretes substances to neutralize its acidity thus allowing
The Halstead Tactual Performance Test This procedure used a version of the Seguin-Goddard Form board, but it is done blindfold. The subject's task is to place all the 10 blocks
Limnology : It is the study of organisms present in rivers or fresh water lakes. Limnology is also called as freshwater science. This is the study of inland waters. Limnology is of
Q. Why is a man’s voice usually lower than a woman’s voice? Pitch of the voice-how low or high it sounds-it depends on the length, tension and thickness of the vocal cords. As
Explain what an isotope is and explain one use of isotopes.
Which type of genetic disease can be identified from the visual analysis of the number of chromosomes present in a karyotype? The counting and identification of chromosomes in
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What are the functions of the spleen? Why is a total splenectomy (surgical removal of the spleen) compatible with life? The spleen has many functions: it participates in the de
Spina Bifida Occulta There is no protrusion of the meninges but the vertebrae are bifid. There are three components of the spina bifida occulta. a) Vertebral- there is
what are the types of autoclaves
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