Glucose | Fructose | Galactose | Maltose | Lactose | Sucrose |
It is also known as 'blood sugar' or dextrose or grape sugar. | It is found in fruits and honey. Also known as fruit sugar. | Sometimes abbreviated Gal, is as sweet as glucose, and about 65% as sweet as sucrose. Found in milk. | Also known as malt sugar. Present in the food items and formed by the digestion of the starch. It is also found in the germinating grains and corn syrup. | It is found in milk. | It is also known as table sugar and is found in plants like sugarcane. |
Chemical formula is C6H12O6 | Chemical formula is C6H12O6 | Chemical formula is C6H12O6 | Chemical formula is C12H22O11 | Chemical formula is C12H22O11 | Chemical formula is C12H22O11 |
Ring structure: | Ring structure: | Ring structure: | Ring structure: | Structure: | Structure: |
Open chain structure: | Open chain structure: | Open chain structure: | There is no open chain structure. | There is no open chain structure. | There is no open chain structure. |
Since, it contains 6 carbons, it is hexose sugar but has six member ring. | It is also a hexose sugar but has five member ring. | It is also a hexose sugar and has six member ring. | It is formed by joining of two hexose glucose units by alpha glycosidic bond. | It is formed by the joining of one galactose and one glucose by beta glycosidic bond. | It is formed by the joining of one galactose and one glucose by alpha gycosidic bond. |
It is a monosaccharide. | It is a monosaccharide. | It is a monosaccharide. | It is a disaccharisde. | It is a disaccharisde. | It is a disaccharisde. |
It is a reducing sugar as it contains free aldehydic group. | It is a reducing sugar as it contains free ketone group. | It is a reducing sugar as it contains free aldehydic group | Maltose is a reducing sugar. | It is a reducing sugar. | It is non reducing. |
It is an aldehydic sugar. | It is a ketonic sugar. | It is an aldehydic sugar. | It is formed by two aldehydic sugars. | It is formed by two aldehydic sugars. | It is formed by one ketose sugar and one aldehydic sugar. |