One name that jumps out from the list above: Philip Morris Companies Inc, one of the world's largest manufacturers of cigarettes and tobacco products. Philipmorris.com states: The Philip Morris name has long been associated with high quality tobacco products and globally recognized cigarette brands.
A type of gene expression control in bacteria. Transcription of a gene under this type of control is induced only when a repressor protein present in the cell is inactivated.
- Bacteria often respond to environmental change by regulating transcription. - Gene expression in bacteria is controlled by the operon model. A. Operons: The Basic Concept-A cluster of functionally related genes can be under coordinated control by a single on-off âswitchâ.- The regulatory âswitchâ is a segment of DNA called an operator usually positioned within the promoter. Almost all the cells in an organism are genetically identical. - Differences between cell types result from differential gene expression, the. expression of different genes by cells with the same genome. - Errors in gene expression can lead to diseases including cancer.