Ribo-This is short for ribose and it is a pentose sugar. Contrast this with the sugar group in DNA which is dexoyribose. Nucleic-Refers to the fact that it originates in the nucleus.
DNA is a double helix formed by base pairs attached to a sugar-phosphate backbone. DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms.
Structure of DNA: The main features of the three-dimensional structure of DNA are: DNA is double-stranded, so there are two polynucleotide stands alongside each other. The two strands are wound round each other to form a double helix. The two strands are joined together by hydrogen bonds between the bases.