If you use cocaine on a regular basis, the byproducts of the drug may be detected in your urine for up to two weeks after your last use. Hair analysis can reveal traces of cocaine use for three or more months after use.
1 rRNA is located in the cytoplasm of a cell, where ribosomes are found. 2  rRNA directs the translation of mRNA into proteins. 3  tRNA or Transfer RNA. 4  Like rRNA, tRNA is located in the cellular cytoplasm and is involved in protein synthesis.nswer: There are actually several types of ribonucleic acid or RNA, but most RNA falls into one of three categories: 1  mRNA or Messenger RNA. 2  mRNA transcribes the genetic code from DNA into a form that can be read and used to make proteins.
Messenger RNA or mRNA is also called messenger ribonucleic acid. This is a type of ribonucleic acid or RNA transcribed from a DNA (deoxyribonucleic acid ) template. One strand of mRNA consists of four different base types including uracil, cytosine, guanine and adenine.