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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.
Insulin binding to insulin receptors in the plasma membrane of a A. liver cell will lead to an increase in the intracellular amounts of cAMP in the liver cell. B. beta-islet
phylum and chordata ex. and their classiication
DISORDER S OF THE ADRENAL CORTEX - ( i ) ADDISON'S DISEASE : This disease is caused by the deficiency of mineralocorticoids and glucocorticoids. Its symptoms include l
How do contraceptive pills generally work? Contraceptive pills generally have the hormones estrogen and progesterone. If taken daily from the 4th day after menses the abnormal
Annexin V is a protein that binds to Phosphatidylserine. Why is this useful in the lab? Does it have to do with testing whether the cell is in normal condition?
Describe the term Physiotherapy? Patients who are sedated, intubated and ventilated are not able to deep breathe, cough and clear secretions. Hence, it is important to do chest
What are the main events of the third mitotic period? The third mitotic period is anaphase. In anaphase the following events happen: duplication and breaking of centromeres wi
What benefits can commensalism offer to a species? Commensalism may include obtainment of food (for instance, the innocuous bacteria of the human gut), shelter or support (epip
Define the Solar Concentration? As in food dehydration, one of the simplest methods of evaporating water is with solar energy. A typical example of this method is production a
Define Basic Calculations during the practical work in Laboratory? Some basic mathematical formulas and conversion factors are given herewith to help you in your calculations d
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