The common thinking is that transcriptionâtranslation coupling is a means for the cell to prevent accumulation of non-functional transcripts in the cytoplasm (;), and hence that it is functionally analogous to nonsense-mediated mRNA decay that occurs in eukaryotic cells (; ;).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.
Size and Appearance. The main difference between these two types of gravel is the size of the rocks. Pea gravel, as its name implies, is small. Generally the stones are around 1/4th of an inch in diameter.They have a smooth, rounded surface and come in many different soft colors such as light blue, light red and beige. Crushed rock, on the other hand is a little bit larger in diameter around 1/2 to 1 inch.ize and Appearance. The main difference between these two types of gravel is the size of the rocks. Pea gravel, as its name implies, is small. Generally the stones are around 1/4th of an inch in diameter.
Concrete has a rougher texture than screed because it contains aggregate and stones â as well as sand and cement. These small stones are typically 20mm or less and are easily visable in the concrete when it is liquid. This is what makes concrete the stronger material. Screed is a type of mortar. It is a smoother mixture made from sand and cement, a soil-type substance and it does not have the gravelly aggregate, the maximum grain size is around 4mm for a dry screed. This allows for a finer grain appearance when compared to concrete in its liquid form.