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The lac operon is an brilliant example of negative control or negative regulation of gene expression in which they bound repressor stops transcription of the structural genes. The Positive control or positive regulation of gene expression is when the regulatory protein binds to enhances and DNA the rate of transcription. In that case the regulatory protein is called as an activator. The CAP or CRP included in regulating the lac operon is a good instance of an activator. Thus the lac operon is subject to both positive and negative control.
Explain the Sensory Respiratory center - Feature of Medulla Respiratory center: The center for regulating rate and depth of respiration is present in the medulla. Here, nerve i
Nongonococcal nonchlamydial urethritis and cervicitis Nongonococcal urethritis (NGU) in men is often nonchlamydial as well. Possibly caused by Ureaplasma urealyticum, Mycoplas
Q. Morphology in relation to taxonomy? Morphology is the basic tool of taxonomy, because identification is primarily based on the characters of the plant. The morphological cha
V apour Theory (i) It was proposed by a Greek philosopher Pythagoras in 500 B.C. (ii) Each organ of an animal body emitted some kind of vapour and that a ne
M o n o c l o n a l antibodies: Hybridoma technology for production of monoclonal antibodies is one of the most important advancements in the f
Chlorophyll Chlorophyll is the porphyrin most widely used as a natural colourant. Its widespread occurrence in photosynthetic tissue and its breakdown character have prompted
Q. What are the four major groups into which the study of the plants is divided? In Botany the plant kingdom is divided into pteridophytes, bryophytes, angiosperms and gymnospe
Within the cell nucleus the major structures are: the nucleolus, an optically dense region, spherical shaped, where there are concentrated ribosomal RNA (rRNA) associated to protei
what is virus
Endoplasmic reticulum (ER) is the network of membranous tubules in the cytoplasm of a cell; involved in production of the phospholipids, proteins, and the other functions. Rough E
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