Which of the Following May Characterize Monosaccharides

Question

Which of the following may characterize monosaccharides?  
A) An amino group
B) An amide group
C) A backbone of eight carbon atoms
D) One carbonyl group
E) The presence of glycerol and fatty acids

Accepted Answer

Monosaccharides are simple sugars that have only one carbonyl group. The other options (A, B, C, and E) do not characterize monosaccharides. Amino groups are often found in amino acids, amide groups in proteins, a backbone of eight carbon atoms is not typical for monosaccharides, and glycerol and fatty acids are components of lipids.