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.
However, there  are three different types of RNA including:   mRNA (messenger RNA) carries messages coded in DNA from  the nucleus or nucleoid to the site of protein synthesis  (ribosomes) in cytoplasm.  rRNA (ribosomal RNA) is found in the structure of  ribosomes, together with ribosomal proteins.