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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.
BIOLOGY - A SCIENCE OF EXCEPTION - Some common examples to prove it are - 1. Embryos of dicot plants have 2 cotyledons but in cuscuta (Dodder plant or amer bel or Aka
The question asks . . . 18 moles of moles of maltose are completely oxidized by the reactions of the final oxidative pathways (Embden-Myerhoff Pathway and Krebs Cycle). How many AT
Which of the following is TRUE about the properties of aqueous solutions? Select one: a. A pH change from 5.0 to 6.0 reflects an increase in the hydroxide ion concentration (
Organ Systems : Organisms are composed of organ systems. Each organ system is made up of several different organs. For example, the digestive system is composed of several organ
The best way to maintain quality of air and pollutant's emissions is by using less polluting fuels and processes. Following can be taken to control air pollution. Source correc
When the work sheet is finished all the essential information to prepare the statement of retained earnings, income statement and balance sheet is readily available. Currently you
Protein Stabilized Food Emulsions Many food products are emulsions (eg. milk cream, ice creams, cream, butter etc.) and protein constituents often play a major role in the stab
Explain about Stacking faults Stacking faults happen in a number of crystal structures, but the common example is in close-packed structures. Face-centered cubic (fcc) struct
The ph of urine can be quite variable. Why? Why is bromothymol blue used as a ph indicator instead of phenal red when titrating blood?
List the causes of implant failure due to improper surgical technique and placement. Failure due to surgical techniques and improper placement: a) Off axis / severe angulati
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