That such coupling is not an incidental consequence of the absence of a spatial barrier is underscored by the phenomenon of nonsense polarity in bacteria, first identified in the lac and trp operons of Escherichia coli nearly 40 years ago (;).everal co-transcriptional activities involving RNA as the substrate serve to prevent the occurrence of R-loops, and the coupling of transcription to translation in the bacteria may be seen as a special instance of such a co-transcriptional activity.
An import is a good brought into a jurisdiction, especially across a national border, from an external source. The party bringing in the good is called an importer.[1][2] An import in the receiving country is an export from the sending country.
Last updated: , see all updates. Part of: Import and export procedures, Import and export and Business tax. Rules to establish the country of origin of imported and exported goods and to help identify those which qualify for lower or nil customs duty.ome goods imported from or exported to certain countries will qualify for preferential treatment-eg lower or nil customs duty, whereas others will have non-preferential status and attract full excise.