This Technical Bulletin was prepared by members of the SSFI Plank-Platform Section. SSFI is a trade association comprising manufacturers of shoring, scaffolding, forming, suspended scaffolding, and planks-platforms. The institute. focuses on engineering and safety aspects of scope products.
The basic building block of DNA is the nucleotide. The nucleotide in DNA consists of a sugar (deoxyribose), one of four bases (cytosine (C), thymine (T), adenine (A), guanine (G)), and a phosphate.Cytosine and thymine are pyrimidine bases, while adenine and guanine are purine bases.The sugar and the base together are called a nucleoside.he nucleotide in DNA consists of a sugar (deoxyribose), one of four bases (cytosine (C), thymine (T), adenine (A), guanine (G)), and a phosphate.
Overview [edit]. A DNA nucleotide is composed of 3 main units: a sugar, a phosphate group, and a nitrogenous base. While the sugar and phosphate group alternate in sequence and form the backbone of the DNA double helix, the nitrogenous bases may differ in every adjoining nucleotide.The four nitrogenous bases present in DNA are adenine (A), guanine (G), cytosine (C) and thymine (T).In RNA, the only differing nitrogenous base is uracil (U) (which replaces thymine in DNA and differs thymine only by the missing methyl group at carbon 5 of the pyrimidine ring).hile the sugar and phosphate group alternate in sequence and form the backbone of the DNA double helix, the nitrogenous bases may differ in every adjoining nucleotide. The four nitrogenous bases present in DNA are adenine (A), guanine (G), cytosine (C) and thymine (T).