What is the function of the lac-A gene in the lac operon?

is an inducible system , it remains generally in off state , but in presence of Lactose it is switched on So Presence or absence of Lactose regulates operon...

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 , i gene is called Regulatory gene. It produces Repressor which bind on the operator region and hence does not allow the movement of Rna polymerase ,

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...

Bicoid protein gradient formation is one of the earliest steps in fruit fly embryo anterior - posterior patterning. Bicoid is one of few which binds both DNA and RNA...

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...