The four nitrogenous bases that make up the DNA structure are divided into two groups, called purines and pyrimidines. Adenine and guanine are purines, and chemically are double-ringed structures - a five cornered ring and a six cornered ring. They are much larger than pyrimidines.
James Mason (I) (1909â1984) James Mason was a great English actor of British and American films. He was born in Yorkshire, and attended Marlborough and Cambridge, where he discovered acting on a lark, and abandoned a planned career as an architect. Following work in stock companies, he joined the Old Vic under the guidance of Sir Tyrone Guthrie and of Alexander Korda, who ...
The story of George Mason and the Rights of Men has never been told. His life and works await a Boswell. Diogenes was looking for him on the streets of Athens, with a lighted lantern, 400 years B.C. Around 25 A.D. the Son of God was looking for him to make him one of the twelve in Judea.