Lead poisoning causes sudden pain on either side of the lower back, urinary issues, nausea, fever, and chills. Spinal tumor. Spinal tumors can cause back pain, weakness, and numbness in the legs and arms, and more serious issues. Cat-scratch disease. Cat scratch disease is a bacterial infection caused by a cat scratch or bite.
rRNA itself is transcribed in the nucleolus, where ribosomes are assembled (from rRNA and ribosomal proteins) in totality. Keep in mind though, that the ribosomal proteins are translated from mRNA outside the nucleus and imported back in before they can be used for ribosome assembly in the nucleolus.Click to expand...ll RNA is produced in the nucleus. The thing about rRNA is that it is constitutively expressed. The rRNA genes are encoded for multiple times along the length of the genome.
Ribosomes are 2/3 RNA (a type of RNA known as ribosomal RNA or rRNA) and 1/3 protein. RNA is synthesized from viral DNA in an infected cell before protein synthesis begins. Some viruses, for example Tobacco Mosaic Virus (TMV) have RNA in place of DNA. If RNA extracted from a virus was injected into a host cell the cell began to make new viruses. Clearly RNA was involved in protein synthesis.