Question

Which of the following has the highest calories per gram?
(A) Proteins
(B) Fats
(C) Sugar
(D) Glucose

Answer 1

Hint: The food we take up may include carbohydrate, proteins, minerals, fats, vitamins, fibers and water. The complex substances get ingested into the body and get converted into energy, or enzymes or useful for the building up of the bones and other functions.

Complete answer:
The calories are the amount of energy that is used by the body. The carbohydrate, proteins and fats are important sources of the energy. The proteins are mainly present in the pulses and other compounds. They are used for making up of the enzymes, hormones, repairing other body tissues, making up of the muscles, bones, blood, skin, hair, nails etc. $1\,gram$ of proteins is capable of releasing $4\,$ calories of energy. The carbohydrates are the instance and the main source of the energy.

 It is converted into glucose and gets released in the bloodstream where it is transported by insulin to all body cells for making up the energy. $1\,gram$ of carbohydrate releases $4\,$ calories of energy. The fat that is present in the cells stored in the adipose tissues, liver etc. When there is no sufficient glucose in the body, they get converted into energy. Thus $1\,gram$ of fat may release $9$ calories of energy.

Thus the correct answer is option (B).

Note:If the food that we eat contains more and more calories but we do less work to burn calories, results in obesity. Hence the calories in the body must be burned off either in the normal activity of working or by doing exercise. This helps to prevent the body from overweight.