DNA

This chapter will explore the structure of nucleic acids and proteins.DNA StructureDNA is composed of several different subunits. The backbone of the molecule is made of a sugar called deoxyribose. The deoxyribose is held together by phosphate groups. Deoxyribose also forms bonds with the four bases, adenine (A), cytosine ( C), thymine (T) and guanine (G). Figures 8.1-8.6 depict how the subunits are assembled in a DNA molecule. In these figures, black represents adenine, white thymine, dark gray guanine, and light gray cytosine. Figure 8.1: Rasmol Image of DNA Double Helix Segment Figure 8.2: Closer View of DNA Figure 8.3: Conceptual DNA Model

Figure 8.4: Top and Side view of Two Steps Chapter 3 describes how this structure stores information. The order of the four bases (A, T, C and G) read three at a time per table 3.2 determine the amino acid sequence in the final protein