Question

What is the difference between positive and negative gene regulation?

Answer 1

Hint: The process of controlling which genes in a cell’s DNA are expressed is called gene regulation. In multicellular organisms the different sets of genes are present, even if they contain the same DNA. There are two types of gene regulation – positive and negative.

Complete answer:
There are many differences between positive and negative gene regulation.

POSITIVE GENE REGULATION	NEGATIVE GENE REGULATION
Positive regulation is that regulation in which the presence of specific regulatory element increases the expression of genetic information quantitatively.	Negative regulation is regulation in which the presence of specific regulatory elements diminishes the expression of genetic information.
It is the type of gene regulation which enables the expression of genes.	It is the type of gene regulation which helps to prevent gene expression.
By the promoter region of the gene, transcription factors bind.	By the operator region of the gene, repressors bind.
The transcription factors bind to DNA which are enabled by the binding of allosteric effectors.	The binding of repressors to DNA is prevented by the binding of the allosteric effectors.
It helps to enable the transcription.	It helps to disable the transcription.
It helps to turn the genes on.	It helps to turn the genes off.
Binding of RNA polymerase to the promoter region is enabled by the binding of transcription factors.	The binding of RNA polymerase into the promoter region is prevented by the binding of repressors to the operator region of the gene.

Note: Depending upon the type of organisms, regulation of genes occurs differently. Due to the presence of nucleus in eukaryotes, the gene regulation also different from prokaryotic that do not contain nucleus. Eukaryotes contains both multicellular and unicellular while prokaryotes contains only single celled organisms.