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While various positive control components lie close to the gene they regulate additional can be situated long distances away (sometimes 10-50 kb) either upstream or downstream of the gene shown in the figure. A long-distance positive control series of this type is called as an enhancer if the transcription factor(s) which binds to it enhances the rate of transcription. An enhancer is classically 100-200 bp long and haves several sequence elements which act together to give the whole enhancer activity. When they were first found, enhancers were viewed as a distinct class of control component in which they:
? Over long distances can activate transcription;
? It can be located downstream or upstream of the gene being controlled;
? Are active in moreover orientation with respect to the gene.
Q. What is the binding between two amino acids called? The chemical bond between two amino acids is called a peptide bond.
Q What are the amphibian features that make them dependent on water to survive? Permeable skinexternal fecundation, body subject to dehydration, larval stage and eggs without s
how ova is produced
Cells regulate their level of activity by regulating the amount of proteins present in the cell at any given time, so an up regulation of enzymes would be expected to A. increase t
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Define about the Sucrose and Trehalose? Sucrose, also called saccharose, is ordinary table sugar refined from sugar cane or sugar beets. Trehalose has two a-D-glucose molecu
i need examples of animals that belongs to vertevrate pisces
What is bioremediation? Bioremediation is the use of microorganisms, as bacteria, protists and fungi, to degrade noxious substances turning them into non toxic or less toxic su
what is sclerotic
J-shape d - It shows 2 phases - (i) Lay phase (ii) Exponential phase
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