The sciatic nerve is a sensory motor nerve with two divisions that innervate the muscles behind and below the knee. These divisions are the tibial and peroneal nerves. The sciatic nerve is a sensory nerve that originates from the 7th lumbar vertebrae and sacrum of a dogâs spinal cord.
1 Because prokaryotic DNA can interact with the cytoplasm, transcription and translation occur simultaneously. 2  Most prokaryotes contain only one copy of each gene (i.e., they are haploid). 3  Nonessential prokaryotic genes are commonly encoded on extrachromosomal plasmids.
1 More prokaryotes inhabit a handful of fertile soil or the mouth or skin of a human than the total number of people who have ever lived. 2  Prokaryotes are wherever there is life. 3  They thrive in habitats that are too cold, too hot, too salty, too acidic, or too alkaline for any eukaryote. On average, a prokaryote has only about one-thousandth as much DNA as a eukaryote. 2  In the majority of prokaryotes, the genome consists of a ring of DNA with few associated proteins. 3  The prokaryotic chromosome is located in the nucleoid region.