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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.
The ability to maintain myocardial perfusion at constant levels in the face of changing driving presence is termed autoregulation. In normal cases, autoregulation is maintained at
difference between axon and cyton
According to the stimuli they collect how are the sensory receptors classified? The sensory receptors are divided according to the stimuli they get: mechanoreceptors are stimul
What is the significance of proteins for living beings? Proteins play a fundamental role in nearly all biological processes. Because of their diversity they can assume many dif
Direct demonstration of the causative agent by electron microscopy (EM): Where facilities for electron microscopy are available and a viral disease is suspected, presence o
Define Class Turbellaria - Flatworms ? Members of these two Classes are known as the flukes. Flukes are parasitic flatworms that inhabit tropical areas like Southeast Asia and
What are the main interspecific ecological interactions? The major harmonious interspecific ecological interactions are: protocooperation, mutualism and commensalism. The major
What is Glycolysis in Cell Metabolism? Glycolysis : is the process that breaks down glucose into pyruvate and energy. Glycolysis does not require the presence of oxygen and
What is yellow fever? Yellow fever is a viral infection that happens mainly in Central Africa and in the Amazon region of South America. It is prevented through vaccination and
Frequency - Synthetic Characters This term refers to the degree of dispersion of individual species in an area, and is usually expressed in terms of percentage. Frequency can
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