1 A hematoma is a collection of blood outside of a blood vessel. 2  Symptoms of hematomas depend upon their location and whether adjacent structures are affected by the inflammation and swelling associated with the bleeding.
What is RNA? Ribonucleic acid, or RNA is one of the three major biological macromolecules that are essential for all known forms of life (along with DNA and proteins). A central tenet of molecular biology states that the flow of genetic information in a cell is from DNA through RNA to proteins: âDNA makes RNA makes proteinâ.
RNA is, in fact, the second of the two types of nucleic acids; however, there are a number of structural differences between the two. First let's address the name. Like DNA, RNA is a nucleic acid composed of a sugar, a phosphate group and a nitrogenous base. One difference between DNA and RNA is the sugar.his type of RNA is called ribosomal RNA, or rRNA. Remember that DNA and RNA differ slightly at the nucleotide level. Therefore, the process of transcribing DNA into RNA not only changes the information from a double-stranded into a single-stranded molecule, but also changes all the thymine bases into uracil ones.