Identifying Functional Groups in Biologically Relevant Compounds

Upon examining a series of organic compounds, a researcher identifies various functional groups present in their molecular structures. One specific compound, which has been isolated from a plant source and is known for its antibacterial properties, contains a carbonyl group adjacent to a hydroxyl group. This arrangement is characteristic of a certain class of organic compounds. What type of functional group does this compound predominantly display?

In your analysis, consider the implications of the functional groups in relation to their chemical reactivity and biological significance.