Write the chain structure of D galactose and D mannose?

The ring form of ribose is a component of ribonucleic acid (RNA). Deoxyribose, which is missing an oxygen at position 2, is a component of deoxyribonucleic acid (DNA). The ring forms of ribose and deoxyribose are illustrated here. They are written in a furanose ring structure.

The rearrangement produces a form when the hydroxyl group (OH) on C-1 is on the opposite side of the -CH₂ OH group (in a ring structure), or β form when the hydroxyl group is on the same side as the -CH₂ OH grouping.

The glucose ring form is created when the oxygen on carbon number 5 links with the carbon comprising the carbonyl group (carbon number 1) and transfers its hydrogen to the carbonyl oxygen to create a hydroxyl group. Isomers, such as these, which differ only in their configuration about their carbonyl carbon atom are called anomers. Here are the structures of the D and L form of β-glucose.