What molecules does carbohydrates consist of
Carbohydrates-Chemical Structure. Carbohydrates consist of the elements carbon (C), hydrogen (H) and oxygen (O) with a ratio of hydrogen twice that of carbon and oxygen. Carbohydrates include sugars, starches, cellulose and many other compounds found in living organisms.In their basic form, carbohydrates are simple sugars or monosaccharides.These simple sugars can combine with each other to form more complex carbohydrates. The combination of two simple sugars is a disaccharide.arbohydrates include sugars, starches, cellulose and many other compounds found in living organisms. In their basic form, carbohydrates are simple sugars or monosaccharides. These simple sugars can combine with each other to form more complex carbohydrates. The combination of two simple sugars is a disaccharide.