Question 19.1: Identifying Carbohydrates Determine which molecules are carb......

You can identify a carbohydrate as either an aldehyde or ketone with multiple -OH groups attached or as one or more rings of carbon atoms that include one oxygen atom and also have -OH groups attached to most of the carbon atoms. The molecules in (a), (b), and (d) are carbohydrates. The molecules in (a) and (b) are both monosaccharides, and (d) is a disaccharide. The molecule in (c) is not a carbohydrate because it has only a carboxylic acid group, which is not a characteristic of carbohydrates.