Write about lipids.

Explanation

Carbohydrates are sugar and starch. These are the major source of cellular fuel which provides energy. The caloric value of carbohydrate is `4.1 `calories per gram and its physiological fuel value is 4 Kcal per gram.
Lipids are fats and derivatives of futs, are also the best reserved food stored in our body which is used for production of energy. Fat has a caloric value of `9.45` kcal and a physiological fuel value of 9 Kcal per gram .