If the level of lactose is low what happens to the lac operon system?

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 ,

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...

The plant cell is far easier to answer. Plant cells, at least in the stem, rely on turgidity to remain straight. The central vacuole exerts pressure on the cell wall,...

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...

Organic substances have a relatively low polarity and generally have weaker intermolecular forces to hold them together tightly.

The of the $NaH$ molecule will be $3.340 * 10^(13)"s"^(-1)$. When dropping from the second vibrational level to the first, energy will be released, since the second vibrational level...