![]() This is done by the sugar phosphate backbone twisting around itself in a coil. one runs 3' to 5', the other run 5' to 3'. DNA is wound into an right-handed double helix. Kilpatrick S. Figure 1 Diagram showing the sugar phosphate backbone of DNA, and the nitrogenous bases attached to it, forming a nucleotide. These two sugars only differ by one -OH group being changed to an -H, but provides different capabilities for each molecule. On on the other hand, the sugar in the backbone of RNA is called ribose. Each nucleotide consists of the 5-carbon sugar deoxyribose, a phosphate group, and one of four possible nitrogenous bases (the purines adenine and guanine, and the pyrimidines, cytosine and. In DNA, the sugar involved is deoxyribose. However, their sugar phosphate backbone differs slightly. RNA and DNA are both examples of phosphodiesters and have a very similar structure. (Deoxyribose is the name of the sugar found in the backbone of DNA.) In between the two sides of this sugar-phosphate backbone are four nitrogenous bases. One turn of this helix is 34nm long, the diameter of it is 2nm, and there are ten bases attached per turn at 0.34nm. These features make DNA can repel water and would not hydrolysed and breakdown by the aqueous environment. DNA is very stable due to rungs of “ladder” is hydrophobic and phosphate sugar backbone of DNA is negatively charged. ![]() Carbons in the pentose are numbered 1 through 5 (the prime distinguishes these residues from those in the base, which are numbered without using a prime notation). The purpose of this twisting is to protect the bases inside it, and prevent them from being damaged by the environment. A nucleotide is made up of three components: a nitrogenous base, a pentose sugar, and one or more phosphate groups. one runs 3' to 5', the other run 5' to 3'. This is done by the sugar phosphate backbone twisting around itself in a coil. Nucleotides that compose DNA are called deoxyribonucleotides. Figure 1 Diagram showing the sugar phosphate backbone of DNA, and the nitrogenous bases attached to it, forming a nucleotide Structure of DNAĭNA is wound into an right-handed double helix. The sugar molecule has a central position in the nucleotide, with the base attached to one of its carbons and the phosphate group (or groups) attached to. The building blocks of nucleic acids are nucleotides.
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