A carbohydrate is an organic compound,they are major source of energy,In biochemistry,it is called synonym of saccharide.
that consists only of carbon, hydrogen, and oxygen, usually with a hydrogen:oxygen atom ratio of 2:1
They are polyhydroxy shape.
Groups of carbohydrates (saccharides)
The carbohydrates (saccharides) are divided into four chemical groupings:
Role of carbohydrates
Carbohydrates perform numerous roles in living organisms.
Monosaccharides are the major source of fuel for metabolism, being used both as an energy source (glucose being the most important in nature)
Sucrose, also known as table sugar, is a common disaccharide. It is composed of two monosaccharides.
The three saccrides join to form oligosaccarides.
Polysaccharides serve for the storage of energy (e.g., starch and glycogen).
Storge of carbohydrates
In many animals, including humans, this storage form is glycogen, especially in liver and muscle cells,but storage of liver is limited so any unused carbohydrate is converted
Source of carbohydrates
Foods high in carbohydrate include fruits, sweets, soft drinks, breads, pastas, beans, potatoes, bran, rice, and cereals. Carbohydrates are a common source of energy in living organisms; however, no carbohydrate is an essential nutrient in humans.
when 1 gram of carbohydrate is fully oxidized it
produce about 17 kilojoules of energy.