Carbohydrate, in fact it is the most common.
The most common is lactose intolerance.
starch and cellulose.
Glucose is the most common fuel the mitochondria consumes.
The common fuel that mitochondria consume is glucose, which is broken down through a process called glycolysis to produce energy in the form of adenosine triphosphate (ATP). However, mitochondria can also utilize other molecules such as fatty acids and amino acids as sources of fuel under certain circumstances.
The most common carbohydrate energy source for most organisms is glucose. Other common sugars are fructose and galactose, but glucose by far is the most common. Glucose is not only the most common as a simple sugar (monosaccharide), but also as the basic link in larger polysaccharides, including the disaccharide sucrose and the polymers glycogen and amylose.
it uses it for fuel
Most common jet fuel is kerosine based and not corrosive.Most common jet fuel is kerosine based and not corrosive.
Diabetes mellitus is the most common disorder of carbohydrate metabolism, and it is abbreviated DM.
Sugar is actually a crystalline carbohydrate. There are multiple types of sugars, the most common being sucrose, lactose and fructose. So, to answer your question, sugar is a carbohydrate, not a fat.
Carbohydrate Fuel Factor: 4kcal/g Fat Fuel Factor: 9kcal/g Protein Fuel Factor: 4kcal/g Carbohydrates are the preferred source of energy and used quickly. Fat is then a backup source of energy when carbohydrate fuel availability is insufficient. Protein fuel is used when both carbohydrate and fat available fuel is inadequate; however, it is a less efficient back up source.
They are very common. They are, for example, the most common fuel source.