Answer:
The two main classes of carbohydrates are:
Monosaccharides: These are simple sugars, such as glucose, fructose, and galactose, that cannot be broken down into simpler sugars.
Polysaccharides: These are complex carbohydrates, such as starch and cellulose, that are made up of multiple monosaccharide units bonded together. These can be broken down into simpler sugars through hydrolysis.