The glial cells outnumber theneurones and the two cell types occupy a comparable amount of space in nervous tissue. The main glial cell types are, inthe central nervous system, astrocytes and oligodendrocytes and, in the peripheral nervous system, Schwann cells, entericglial cells and satellite cells.he glial cells outnumber theneurones and the two cell types occupy a comparable amount of space in nervous tissue. The main glial cell types are, inthe central nervous system, astrocytes and oligodendrocytes and, in the peripheral nervous system, Schwann cells, entericglial cells and satellite cells.
1 Cytosine is found in both DNA and RNA, but thymine is only found in DNA and uracil is only found in RNA.  A nucleotide is formed when a phosphate attahes to the 5' carbon of the sugar and one of the nitrogenous baseses attaches to the 1' carbon of the sugar.
Other than these differences, DNA and RNA are the same. Their phosphates, sugars, and bases show the same bonding patterns to form nucleotides and their nucleotides bind to form nucleic acids in the same way. 1  RNA is a single-stranded nucleic acid.2  RNA has a ribose sugar instead of a deoxyribose sugar like DNA. 3  RNA nucleotides have a uracil base instead of thymine.he main difference between the three-dimensional structures of DNA and RNA is that in RNA the three-dimensional structure is single-stranded.