Answer
(d) a monosaccharide
Work Step by Step
Monosaccharides are simple sugars. They typically are composed of carbon, hydrogen, and oxygen in a ratio of 1:2:1. Amino acids, fatty acids, and nucleic acids lack this ratio and/or have atoms other than carbon, hydrogen, and oxygen. Pentose is a sugar, but it has five sides rather than six. Therefore, the answer must be monosaccharide.
