Energy values of carbohydrates, fats, and proteins

Question 1

What is the energy content of 1g of fats/oils?

Answer 1

37 kJ g-1

Question 2

What is the energy content of 1g of protein?

Answer 2

17 kJ g-1

Question 3

What is the energy content of 1g of carbohydrates?

Answer 3

16 kJ g-1

Question 4

Which macromolecule provides the most readily available form of energy?

Answer 4

Carbohydrates

Question 5

What substance are excess carbohydrates stored as in the body?

Answer 5

Glycogen

Question 6

What is the energy product formed when carbohydrates are broken down?

Answer 6

Glucose

Question 7

What are the products in the exothermic reaction that breaks down fats?

Answer 7

CO2 and H2O

Question 8

Which macromolecule is next used when no carbohydrates are available?

Answer 8

Fats

Question 9

In one serving of white bread, there is:
3.1g Protein 
1.3g Fat
14g Carbohydrate
What is the total energy content (kJ) in one serving of bread?

Answer 9

324.8 kJ per serving

Question 10

In 100g of chicken, there is:
33g Protein 
8g Fat
0g Carbohydrate
What is the total energy content (kJ) in 100g of chicken?

Answer 10

857.0 kJ per 100g

Question 11

In 100g of avocado, there is:
2g Protein 
15g Fat 
8.5g Carbohydrate 
What is the total energy content (kJ) in 100g of avocado?

Answer 11

726.0 kJ per 100g

Question 12

Does water, vitamins, minerals, or fibre act as an energy source?

Answer 12

No

Question 13

In 100g of tomato sauce, there is 548.0kJ. What will be the energy content in a serving size of 15g?

Answer 13

82.2 kJ