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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.
Are the phloem and the xylem made of living cells? The cells of phloem are living cells and the cells that constitute the xylem ducts are dead cells killed by the lignin deposi
Floor of nose and Nasal spine Although variable, the nasal floor is typically situated 5-9mm below the level of inferior turbinates. The inferior piriform rim is used as a guid
Explain biomaterial implantation When a biomaterial is introduced into the host, in addition to a host response there is also a material response. Immediately on implantation,
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Explain the effect on Vitamins of the human milk? Although there are inter-individual variations in vitamin concentrations, diet and drug use by individual women influences vit
Dissociation and double dissociations Neuropsychologists typically try to design studies that provide evidence of the differential performance of brain damaged and control subj
main external morphological feature that differentiates platyhelminthes from nematodes
Q. What do you mean by Wound closure? Generally the incisions designed for minimal exposure such as the H - shaped incision, do not require suturing, as the abutment and the tr
Q. Use of Chemicals to Control and Destruct Microorganisms? Ans. The use of chemicals, as a process of food preservation, has been used since long, ever since man found
Air pollution affects both living and non-living matter. The effects can be classified as.
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