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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.
What is the phototropism? The Phototropism is the movement of plant structures in response to light. The Phototropism may be negative or positive. The Positive phototropism is
Measuring ecosystem diversity is not easy, and ther e is no definite index for its measurement. It is generally assessed by the measure of species diversity in an ecosystem, often
Which are plant tissues that cover the stem and the leaves? The stem perhaps covered by epidermis (having stomata, cuticle and photosynthetic cells) as in monocots or, alternat
Q. How does the embryo turn from gastrula into neurula? How is the neural tube formed? What is the embryonic origin of the nervous system in vertebrates? The neurula stage is c
There are different types of insulin available and prescribed by the doctor according to the need of the patient. Insulin is grouped according to the speed of action in the body i.
Define Genetic engineering and Biotechnology Genetic engineering or recombinant DNA technology, involves the use of a variety of enzymes, such as restriction endonucleass and
In Chemical Reactions that have a large negative /\Go' a- the total amount of both reactants and products decreases b- the products are less stable than the reactants c- t
A diploid cell contains four pairs of homologous chromosomes designated C1 and C2, M1 and M2, S1 and S2, and W1 and W2. Predict the number of different haploid cells that could be
Q. Describe U - Waves? The U-wave is usually upright if the T is also upright and is highest at low rates. When the heart rate increases to more than 90, the U-wave is rarely v
Can someone describe the fundamental aspects of protein structure? I'm already familiar with the amino acid structure, I just don't have a clear conceptual understanding of protein
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