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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.
Is transpiration the only way through which leaves lose water? Plants do not only lose water as vapor, as by transpiration. The leaves also lose liquid water by a phenomenon c
why is it known as middle man
Which of the following results from the elimination of DNA ligase activity in a cell? A. The oligonucleotide primers will not be removed from the genome - as they often contain
Bone Modeling It is a surface-specific activity (apposition or resorption) that produces a net change in the size and/or shape of a bone after initial bone formation in the emb
Q. What is Etiopathology? Who is likely to develop gout? What are the risk factors? Let us find out. Gout is caused when there is over production of uric acid in normal purine
In the presence of oxygen, the process of glycolysis produces which of the following products? A) 2 glycerol B) 1 lactate C) 2 lactate D) 2 pyruvate E) 1 pyruvate
Why can the crossing of an individual that manifests dominant phenotype with another that manifests recessive phenotype (for the same trait) determine whether the dominant individu
What are the factors to an actual shift in the supply curve? Factors which cause an actual shift in the supply curve are described in below: When prices rise or fall this wo
What are persistent organic pollutants (POPs)? POPs, or persistent organic pollutants, are toxic substances formed from organic compounds. POPs are made in several industrial p
Q What are the kinds of digestion and of digestive system of platyhelminthes? Flatworms have incomplete digestive systems and they present intracellular and extracellular compl
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