What is the regulatory gene, or the regulatory elements in an operon?

These are basically sequences that code for that regulate the expression of the operon. In , they are usually located slightly upstream of the operon. The is a good...

The of E . coli is a cluster of three structural genes, encoding involved in lactose metabolism and the sites on the DNA involved in regulation of the operon. Normally...

In switch on condition of gene A codes for transacetylase (an enzyme), which convert lactose into its active form i.e. allolactose.

Lactose does not easily diffuse across the E. coli and must be actively transported into the cell by enzyme permease the enzymes galctosidase, permease and transacetylase are produced in...

The lac operon codes for required to transport lactose into the cell and to break it down. CAP enables to use alternative carbon sources such as lactose in the...

If the level of inducer lactose is low then the operator is again blocked by repressor so that the structural genes are repressed once again; to repress the synthesis...

The triplet code determines the sequence of amino acids in the polypeptide chain. Complete change in the triplet code for a particular amino acid will change the expression of the...

First, we should know what a frameshift mutation is! Frameshift are insertions or deletions of nucleotides in DNA that change the reading frame (the grouping of codons). Recall...

Operons were found in eukaryotes in the 90´s. Although they are common in prokaryotes, operons can be detected in chordates for instance. If you are interested, I´d suggest you have...

The main reason the noble gases do not need to bond with other is that their outermost subshells are filled. These are known as . Take helium for example. It...