desossiribonucleoside

A desoxyribonucleoside is a molecule composed of a deoxyribose sugar and a nucleobase. It is a fundamental building block of deoxyribonucleic acid (DNA). The deoxyribose sugar is a five-carbon sugar that is similar to ribose, but it lacks an oxygen atom at the 2' carbon position. The nucleobase can be one of four types: adenine (A), guanine (G), cytosine (C), or thymine (T). These bases are heterocyclic aromatic organic compounds.

When a phosphate group is attached to the desoxyribose sugar, the molecule becomes a desoxyribonucleotide. Desoxyribonucleotides are the monomers that link together to form DNA. The sequence of these bases along the DNA strand carries the genetic information. The specific desoxyribonucleoside formed depends on which of the four nucleobases is attached to the deoxyribose sugar. For example, when adenine is attached, it is called desoxyadenosine. Similarly, desoxyguanosine, desoxycytidine, and desoxythymidine are formed with guanine, cytosine, and thymine, respectively. These molecules play a crucial role in DNA replication, transcription, and repair processes.