Positive and negative regulation, Biology

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.

 

 

Posted Date: 4/11/2013 1:46:23 AM | Location : United States







Related Discussions:- Positive and negative regulation, Assignment Help, Ask Question on Positive and negative regulation, Get Answer, Expert's Help, Positive and negative regulation Discussions

Write discussion on Positive and negative regulation
Your posts are moderated
Related Questions
The nominalists deny the existence of Plato's "types". For them only individuals exist. Species are man-made artificial abstractions. But naturalists, the biologists who have actua

You measure the stability of your favourite protein kinase and find that half of the protein is degraded every 10 minutes. How might you test whether the protein is degraded throug

Kidney impairment is one of the long term complications of diabetes mellitus. Measurement and monitoring of kidney function parameters such as urea and creatinine, in addition to u

Procedure for Test the Presence of Sugar in Honey? 1. Mix 5 grams of honey with 5 ml ether in a mortar and pestle. 2. Decant off the ether extract into an evaporating dish.

Explain about the Zinc Toxicity? Only a few occurrences of acute zinc poisoning have been reported. The toxicity signs are nausea, vomiting, diarrhoea, fever and lethargy and h

Alterations occurring in fish The skeletal muscle of fish consists of short fibers arranged between sheets of connective tissue. The connective tissue in the fish muscle is les

Q. Type one Diabetes Mellitus? Type 1 DM occurs in children and adolescents (6-14 yrs). In this disease, the body makes little or no insulin. Daily injections of insulin are ne

Eucaryotic cell structure All eucaryotic cells have a cytoskeleton made up of a network of protein filaments (Figure shown below). This network gives the cell its shape, capac

The gaseous pollutants can be controlled through the techniques of combustion, absorption adsorption and cold trapping. (a)   Combustion: Though combustion is a major cause of i

Vitamin E (DL-α-Tocopherol) DL-α-Tocopherol is a yellow to red-brown,  clear, viscous oil almost without odour which decolourise when exposed to light and air. DL-α-Tocopherol