(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.
A transcription unit is a linear sequence of DNA that extends from a transcription start site to a transcription stop site (Figure 4). Figure 4. The promoter, a DNA sequence that lies upstream of the RNA coding region, serves as an indicator of where and in which direction transcription should proceed.The promoter is not actually transcribed; its role is purely regulatory.he terminator, a sequence of nucleotides at the end of the transcription unit, is transcribed along with the RNA coding region. The terminator serves as a speed bump of sorts; transcription stops only after this region has been transcribed.