Define ketose. A) Only ketose molecules have CH₂OH. B) Ketose molecules have ketone functional groups. C) Ketose molecules have aldehyde functional groups. D) Ketose molecules are all five-membered rings.

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Ketose molecules are a type of monosaccharide that have a ketone functional group (C=O) on one of their carbons. This distinguishes them from aldose molecules, which have an aldehyde functional group (H-C=O) on one of their carbons. The presence of CH₂OH is not specific to ketoses and refers to the general structure of monosaccharides. The ring size of a ketose molecule can vary and is not restricted to just five-membered rings.

Define Ketose