(Taenia solium, Taenia saginata, Taenia asiatica) and associated diseases. Life cycles of all taenids are very similar. T. solium is distinguished by its ability to use humans not only as definitive hosts but also as intermediate hosts. Because of this, the species is most important within this group of parasites.Taenia solium, Taenia saginata, Taenia asiatica) and associated diseases. Life cycles of all taenids are very similar. T. solium is distinguished by its ability to use humans not only as definitive hosts but also as intermediate hosts. Because of this, the species is most important within this group of parasites.
Transcription unit. Definition. noun. A stretch of DNA being transcribed into an RNA molecule. Supplement. Transcription units are mapped by kinetic studies of rRNA synthesis. It can also be visualized by electron microscopy.ranscription unit. Definition. noun. A stretch of DNA being transcribed into an RNA molecule. Supplement. Transcription units are mapped by kinetic studies of rRNA synthesis. It can also be visualized by electron microscopy.
Transcription is the first stage of the expression of genes into proteins. In transcription, a mRNA (messenger RNA) intermediate is transcribed from one of the strands of the DNA molecule. The RNA is called messenger RNA because it carries the 'message' or genetic information from the DNA to the ribosomes, where the information is used to make proteins. Transcription may be broken into five stages: pre-initiation, initiation, promoter clearance, elongation and termination.