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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.
Determine the following term - Amniote egg Eggs that shelter the developing embryo in a water-filled sac—the amnion. Characteristic of the amniote animals, which include reptil
Quantitative changes The quantitative changes in the availability of the active biomolecules occur in order to compensate for the loss of efficiency of the system caused by th
describe the path of nitrogen through its biogenochemicsal cycle
Pollen Tube Structure The pollen tube in the stigma is filled with cytoplasm containing numerous mitochondria and dictyosomes. The number of dictyosome cisternae is reduced i
What would be the advantage of using a patient's own stem cells e.g. blood stem cells, to treat his or her illness? The benefit of using stem cells from the patient being trea
What important changes will you find in the tissue of the fat person from those of a lean and thin person
Q. What is the difference between spermatocyte II and spermatocyte I? The spermatocyte I (2n) undergoes the first division of meiosis (meiosis I) originating two spermatocyte I
Hypolimnion - Summer Stratification This zone forms the bottom layer which is deep, cold and non- circulating. The hypolimnion is generally rich in nutrients though its oxygen
Developmental Concepts Unique to Infants and Young Children The cognitive and social emotional development of infants and very young children has unique features. This age rang
Classification
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