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
Class Pycnogonida of Phylum Arthropoda Measures generally 3-4 mm; body chiefly made up of cephalothorax, abdomen being very small; generally four pairs of walking legs; long p


Nine-year-old Alek is admitted to the emergency room with a closed fracture of the right femur. Radiography revels that the fracture crosses the distal epiphyseal plate. What conce

The protein collagen has a high proportion (20% or more) of A. asparagine and glutamine B. proline and hydroxyproline C. glycine D. both A and B E. both A and C F

In humans, starch digestion begins in the buccal cavity, but stops in the stomach .Why?

What is the central principle of molecular biology?

There is no store for nitrogen-having compounds as there is for carbohydrate (glycogen)   or lipids (triacylglycerol).  Thus nitrogen ingested in excess of what is required through

Q. What is an etiological agent of disease? The etiological agent of disease is the agent that causes the disease. It may perhaps a living being, substance or environmental fac

Explain the effect of Deficiency of Copper in Human? Owing to the remarkable homeostatic mechanisms, copper deficiency in humans is rare. However, copper deficiency has been re

Heparinisation Blood when allowed to flow out from body to the circuit tubings can get clotted. To prevent this, heparinisation is done. Patient is administered 3 mg