Source of carbohydrates:
Carbohydrates are the most abundant class of carbon containing compounds. They varied sources.
Monosaccharides such as glucose, fructose and galactose are obtained from fruits, vegetables and cereals. They are also present in honey.
Disaccharides such as surcose is obtained in sugarcane, sugar beet and fruits. Maltose is found in cereals. Lactose is main sugar in milk and dairy products.
Cellulose is obtained from e.g. cotton is pure cellulose.
Strach is present in cereals, wheat, barley, rice, maize, potato, sweet potato etc.