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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.
Describe in brief about retina The retina is a highly complex layer of nervous tissue. The photoreceptors are rods and cones for scotopic and photopic vision respectively. The
Deforestation - Degradation of Ecosystem The deforestation is a broad term. It means the removal/destruction of the forest cover or the vegetation of an area. It includes repe
Explain about the Spectrophotometer? The spectrophotometer, a key instrument today in biomedical laboratories, was invented in 1939 by the American chemist Arnold O. Beckman (1
which bones forms lhe non moving muscle attachment in
Amino acid sequence is also known as the primary structure of a protein/polypeptide; the series of amino acids in a protein/polypeptide controlled by the series of DNA bases.
Explain therapeutic diet planning All detailed dietary modifications should be presented with choices, clear guidelines, menu guidance and supporting information as to al
What are the chemical substances that compose the plasma membrane? Ans) The major constituents of the plasma membrane are phospholipids, proteins and carbohydrates. The phosphol
Chromosomes with spindle fiber: The kinetochore fibers of spindle attach to the kinetochore region (specialized area in centromere) of chromosome, and align them at the equator of
How much physical activity is enough? Although it is difficult to prescribe the optimum amount of physical activity, it is important to note that any exercise programme has to
Regeneration - Root and Shoot Morphogenesis Higher plants have three kinds of regenerative activities; All plants possess inherent ability to regenerate lost parts. Fo
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