1/1/2024 0 Comments Sugar phosphate backbone![]() Ribose sugar, a type of pentose sugar, is very important for photosynthesis, respiration, and nucleic acid synthesis.ģ. These are monosaccharides that contain 5-carbon atoms.Ģ. There are some properties of this sugar are discussed belowġ. When a pentose sugar residue of a nucleoside is esterified with phosphoric acid then nucleotide is formed (1) & (2). On the other hand, in purine nucleoside, the link is between nitrogen atom 9 of purine and carbon atom 1’ of the pentose sugar. In pyrimidine nucleoside, the nitrogen atom at position 1 of the pyrimidine ring is linked to carbon atom position 1’ of the pentose sugar. The nitrogenous bases that are present in the nucleic acid are purine and pyrimidine. When the base is combined with this sugar, a nucleoside is formed, such as deoxyadenosine, adenosine guanosine, etc. In addition to pentose sugar, a nucleic acid contains a nitrogenous base and phosphorus group. They have a five-membered ring in their structure. These are ribose sugar and deoxyribose sugar. ![]() There are two types of pentose sugar found in nucleic acid. In addition to ribose and deoxyribose, a few other examples of this type of sugars are D-Ribose, D-Arabinose, D-Xylose, D-Ribulose, D-Xylulose, etc. Ribose and deoxyribose are in linear form when they are free but are present as furanose form when they are in the part of nucleic acid. Examples of these sugars are deoxyribose sugar of DNA and ribose sugar of RNA. It is known as pentose sugar because it is pentagonal in shape with a carbon atom at its five corners. Below is a description of its structure and function (3) & (4). So it is very important as a component of nucleotides. In nucleic acids, this sugar and phosphates are connected to each other in an alternative chain (sugar-phosphate backbone) by phosphodiester connection. Nucleic acids naturally act as molecules that carry primary information in cells. This sugar is found only after the hydrolysis of nucleic acids. The main polymer of nucleotides is nucleic acid. Nucleotides are formed by combining a nitrogenous base and a phosphate group with pentose sugar. These biological molecules carry energy packets to the cell in the form of nucleoside triphosphate (ATP, GTP, CTP, and UTP), which play a key role in metabolic processes. Nucleotides are biological molecules that act as monomers and as subunits of DNA and RNA. Pentose sugar is a component of nucleotides. Two important pentose sugar in nucleotides.
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