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Gene repressor proteins which inhibit the transcription of particular genes in eukaryotes also exist. They may act by binding either to control parts within the promoter region near the gene or at sites located a long distance away from the gene, called as silencers. The repressor protein should inhibit transcription directly. One instance is the mammalian thyroid hormone receptor that, in the absence of thyroid hormone represses transcription of the goal genes. Furthermore, other repressors inhibit transcription by blocking activation. This can be get in one of several ways: by blocking the DNA binding site for an activator protein, through binding to and masking the activation domain of the activator factor, or by forming a non-DNA binding complex with the activator protein. Several instance of every mode of action are known.
How does the excretory system of nematodes work? The metabolic residuals of nematodes are collected by two longitudinal lateral excretory channels that open in one excretory po
Where in the leaves is the photosynthetic tissue often located? The major photosynthetic tissue is the photosynthetic parenchyma (also called as chlorenchyma, do not confuse wi
Define the Food System in space? Mercury (1961-1963) astronauts had to eat bite-sized cubes, freeze dried powders, and semi liquids stuffed in aluminium tubes. For most asbonau
Osteodystrophia fibrosa Osteodystrophia fibrosa is a bone disorder arising due to secondary calcium deficiency in horses, pigs and goats. The disease is characterized by painfu
structural adaptation of mammalian alimentary canal
What is excretion? Excretion in Physiology is the method of elimination of metabolic wastes and other toxic substances from the body.
Astrobiology : This is the branch of scientific enquiry dealing with the possibility of life in the outer space. Astrobiology is a type of study of the evolution, origin, distribut
Determine the function of Osseointegration Osseointegration is also a measure of implant stability, which occurs at two stages- primary and secondary. Primary stability has be
During mitotic anaphase is there separation of homologous chromosomes or separation of identical chromatids? In the anaphase of mitosis the identical chromatids separate and co
Pathphysiology Streptococcal upper respiratory infection leads to production of antibodies. An abnormal immunological response to the upper respiratory infection with Beta- h
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