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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.
Define the Marasmic Kwashiorkor? In countries where the incidence of protein-calorie malnutrition (PCM) is high, a large number of cases show signs and symptoms of marasmus and
Q. How is excretion done in fishes? Fishes have a pair of kidneys that filtrate the blood, bony fishes excrete nitrogen as ammonia NH3 (they are ammoniotelic) and cartilaginous
Natural and Artificial Ecosystem i) Natural ecosystems are those which are mostly free from human disturbances, such as tropical forests, grasslands, oceans, lakes and deserts.
Explain the Recombinantion of DNA ? Recombinant DNA is made by combining DNA from more than one source - often from very different species. The technique is now the basis fo
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Nuclear run-on is a technique used to estimate the relative rate of the transcription of a given gene, as opposed to steady-state level of the mRNA transcript (which is influenced
Explain the Food Applications of guar Guar imparts smoothness to ice cream by promoting small ice crystals during the freezing process. Guar gum in the dressing of cot
Q. Measurement of Colour in Foods? A number of instruments are used for colour measurements in food. a) A simple method is to match the colour of a food with coloured chips
Basic structural pattern of limbs The common structural pattern of tetrapod limbs is extremely clear expressed in their skeletal components and in the manner they are organiz
Endocrine and exocrine pancreatic cells, thyroid and parathyroid endocrine cells, adenohypophysis, adrenal and pineal endocrine cells, the lot of types of gastric exocrine and endo
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