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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 Glass Test Tubes - Food Microbiology Sterile glass tubes are used for culturing microorganisms in liquid or solid media. Sterility in tubes is maintained by using c
In genetic recombination by crossing over what is the difference between parental gametes and recombinant gametes? Parental gametes are those gametes that keep the original lin
Q. How do the potassium and sodium ions maintain the resting potential of the neuron? The plasma membrane of the neuron when at rest maintains an electric potential difference
From your studies in ecology, you must be aware that most ecosystems are quite complex consisting of several habitats and that habitats in turn are composed of microhabitats. Each
Q. Why are pteridophytes more common in humid places? Pteridophytes are more common in humid places since they depend on water for their gametes to fecundate one another. In hu
Does seed germination affect plant growth? Germination does affect plant growth Without germination in the plant, the plant is not capable to grow. The germination is the st
SMAC K - It is a crud by product of heroin synthesis, commonly called brown sugar (Poor man's heroin). The addicts heat the smack powder & inhale its vapour. It is
state 5 advantages and disadvantages of protozoa
Q. Why does not a long lasting vaccine against common cold exist yet? Viruses that present a high mutation rate like the virus that causes the common cold escape easily from th
Systems of Human Body Many organs work in a coordinated'manner to form a system. For example in our-body the nose, the trachea and the lungs form the respiratory system. Table
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