Purines and pyrimidines are two of the building blocks of nucleic acids. Only two purines and three pyrimidines occur widely in nucleic acids. Here are their structures in organic chemists' line notation: The Purines Adenine Guanine The Pyrimidines Cytosine Thymine Uracil.urines and pyrimidines are two of the building blocks of nucleic acids. Only two purines and three pyrimidines occur widely in nucleic acids. Here are their structures in organic chemists' line notation: The Purines Adenine Guanine The Pyrimidines Cytosine Thymine Uracil.
The Irish flag was introduced by Thomas Francis Meagher in 1848. The green represents the Irish people, most of whom most are Catholic. The orange color represents the British supporters of William of Orange who settled in Northern Ireland in the 17th century most of whom are Protestant.The white in the center represents the peace between the two groups.he green represents the Irish people, most of whom most are Catholic. The orange color represents the British supporters of William of Orange who settled in Northern Ireland in the 17th century most of whom are Protestant. The white in the center represents the peace between the two groups.
The Shamrock. One traditional symbol of Saint Patrick's Day is the Shamrock. Shamrock is the common name for several different kinds of three-leafed clovers native to Ireland.The shamrock was chosen Ireland's national emblem because of the legend that St. Patrick had used it to illustrate the doctrine of the Trinity.he beautiful green landscape was probably the inspiration for the national color. Wearing the color green is considered an act of paying tribute to Ireland. It is said that it also brings good luck, especially when worn on St. Patrick's Day.