Q: Calculate the percentage of total energy intake from protein if a diet contains 60g protein, 70g fat, and 250g carbohydrates. (Use $$4 ext{kcal/g}$$ for protein and carbohydrates, $$9 ext{kcal/g}$$ for fat. Total energy = sum of all kcal.)

$$\frac{60 \times 4}{(60 \times 4) + (70 \times 9) + (250 \times 4)} \times 100 \approx 10\%$$

Question 1

According to dietary recommendations, what percentage of your total daily energy intake should come from lipids?

Accepted Answer

20–35%

Question 2

Which of the following is NOT a vital function of lipids in the human body?

Accepted Answer

Synthesizing DNA

Question 3

A person consumes 180 kcal of lipids in a day. How many grams of lipid did they consume? (Use $$1 	ext{g lipid} = 9 	ext{kcal})$$

Accepted Answer

$$20 	ext{g}$$

Question 4

Which tissue is primarily responsible for storing fat for later energy use?

Accepted Answer

Adipose tissue

Question 5

Which of the following statements about fats is TRUE?

Accepted Answer

All of the above are true.

Question 6

Adrian wants to remove all lipids from his diet to lose weight. Which is the BEST advice based on nutritional science?

Accepted Answer

Lipids are an important part of the diet and should make up 20–35% of total calories.

Question 7

Which of the following is a consequence of not consuming enough lipids in the diet?

Accepted Answer

Difficulty building and repairing muscle tissue

Question 8

Lipids are essential for the absorption and transport of which type of vitamins?

Accepted Answer

Fat-soluble vitamins (A, D, E, K)

Question 9

Which of the following is a function of cholesterol in the body?

Accepted Answer

Precursor to vitamin D synthesis

Question 10

If a person is in a calorie deficit, what is the primary role of stored lipids?

Accepted Answer

To provide energy

Question 11

Which of the following best explains why fats are important for organ protection?

Accepted Answer

Fats form a layer around organs, cushioning them from physical shocks.

Question 12

Which of the following is a multi-step process involving lipids in digestion?

Accepted Answer

Lipids are emulsified by bile, then broken down by lipase enzymes, and finally absorbed as fatty acids.

Question 13

Calculate the percentage of total energy intake from protein if a diet contains 60g protein, 70g fat, and 250g carbohydrates. (Use $$4 	ext{kcal/g}$$ for protein and carbohydrates, $$9 	ext{kcal/g}$$ for fat. Total energy = sum of all kcal.)

Accepted Answer

$$\frac{60 	imes 4}{(60 	imes 4) + (70 	imes 9) + (250 	imes 4)} 	imes 100 \approx 10\%$$

Question 14

Which of the following is a reason why lipids are required in the diet?

Accepted Answer

They help form cell membranes and transport fat-soluble vitamins.

Question 15

Which of the following is a common misconception about dietary fats?

Accepted Answer

All fats are unhealthy and should be eliminated from the diet.

Question 16

Which of the following best describes the role of phospholipids in the body?

Accepted Answer

They form the structural basis of cell membranes.

Question 17

A patient is unable to absorb fat-soluble vitamins efficiently. Which dietary component is most likely deficient?

Accepted Answer

Lipids

Question 18

Which of the following is a direct effect of consuming too little dietary fat?

Accepted Answer

Impaired absorption of vitamins A, D, E, and K

Question 19

Which of the following is a correct statement about the energy content of macronutrients?

Accepted Answer

Fats provide $$9 	ext{kcal/g}$$, while carbohydrates and proteins provide $$4 	ext{kcal/g}$$ each.

Lipids: Essential Energy-Supplying Nutrients and Their Functions

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