What is the smallest carbohydrate called?

Monosaccharides

Explanation:

Monosaccharides are the smallest sugars or carbohydrates. First, let's break down the name. "Mono" means one, and "saccharide" means sugar. Therefore, the name literally means "one sugar".

Monosaccharides are also called simple sugars. They cannot be broken down into any other smaller carbohydrates. They contain 3 to 7 carbon atoms. Some examples of monosaccharides are fructose and glucose. They are the monomers, or building blocks of other more complex sugars, like polysaccharides.

Monosaccharide

Explanation:

The smallest carbohydrates are called monosaccharides (mono means "one"; saccharide means "sugar"). As the name implies, these are single sugar molecules. The most common monosaccharides, such as fructose and glucose, have six carbon atoms, but monosaccharides can have as few as three or as many as seven.