Question

Jane consumed a breakfast that contained 85 grams of carbohydrate, 20 grams of protein, and 18 grams of fat. How many kilocalories did Jane eat at breakfast?

Answer 1

The question is incomplete as it does not have the options which are:

A. 392

B. 582

C. 917

D. 1,107

Answer:

B) 582  

Explanation:

The digestion or oxidation of the food substrate provides energy in the form of ATP which can be converted to the SI unit of energy called a calorie.

The oxidation of one gram carbohydrates provides 4 kcal therefore 85 g of carbohydrate provides  85 x 4 = 340 kcal.

The oxidation of one gram of protein provides 4 kcal therefore 20 g of protein provides  20 x 4 = 80 kcal.

The oxidation of fat provides 9 kcal therefore 18 g of fat provides  18 x 9 = 163 kcal.

Therefore the total kcal provided by the food will be-  

340 + 80 + 162= 582 kcal.

Thus, 582 kcal is the correct answer.