Biological Molecules

• AS/A level link for biological molecules -
• Advanced information on Biological molecules -

Carbohydrates

Molecules present in living organisms may be inorganic or organic. Organic molecules include carbohydrates, proteins and fats, These provide energy and have the general formula C_x(H₂O)_n.
These include monosaccharides, disaccharides and polysaccharides. -

Monosaccharides include trioses (n = 3), pentoses (n = 5) such as ribose, and hexoses (n= 6) such as glucose, fructose and galactose. Disaccharides are soluble sugars. They are formed by the condensation of two monosaccharides. Polysaccharides are insoluble polymers such as starch, glycogen and cellulose - . Recap on this section on carbohydrates. -

Biological Molecules Multiple Choice Quiz