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 ...
James Gibson. (b.1938). His Story James Gibson is one of the most active Highwayman painters and perhaps the most successful. He has consistently made a living selling landscapes and has received numerous awards for his excellent paintings.lways a snappy dresser, he claims the key to his success is to ârespect people, donât give up, and put God first. Everything else,â he says, âwill fall into place.â. Born in Moore Haven, Florida, a fourth generation Floridian, James was the first of JC and Bernice Gibsonâs eight children; three children died young.