Question

The energy produced by 1gm carbohydrate is
a. 4.8 cal
b. 4.2 kcal
c. 9 joules
d. 9.2 kcal

Answer 1

Hint: Carbohydrate is an energy-giving nutrient. Carbohydrate is found abundant in nature. It is derived from the food from vegetable origin. Common foods that contain carbohydrates are cereals, legumes, roots and tubers, fruits, dairy products. Carbohydrate consumption is a quick way to get energy.

Complete answer:
Energy is provided by carbohydrates, protein, and fat to the body. The energy provided by them is different in amount. The energy provided by protein and carbohydrate is almost equal per gram. The energy provided by fat per gram is double the amount provided by carbohydrates and protein. Carbohydrates found in food are of three types viz. Starch, sugar, and fiber.
- 4 kcal of energy is provided by carbohydrates.
- 4 kcal of energy is provided by protein.
- 9 kcal of energy is provided by fat.

Carbohydrates are sugar molecules that are digested and broken down into glucose. Glucose acts as the fuel for the body and produces a molecule called adenosine triphosphate (ATP) by a complex process of respiration. Adenosine triphosphate (ATP) is used by the cells for liberating energy.

Hence, the correct answer is option (B).

Note: Sugars and starches are simple carbohydrates and complex carbohydrates respectively. Both sugar and starch provide energy. Fiber is also a complex carbohydrate but is not broken down by the human body. It helps in proper bowel movement and adds fullness to the meal. Extra carbohydrates are stored in the liver as glycogen. Carbohydrates are essential for our body system to run properly.