Question

What functional groups are found in all monosaccharides?

Answer 1

See below

Explanation:

If the monosaccharide is linear, then you'll find either an aldehyde or ketone functional group, along with hydroxy functional groups (or alcohol functional groups).

If the monosaccharide is cyclic, then you'll find either a hemiacetal or hemiketal functional group, a long with hydroxy functional groups (alcohols).