Q: Calculate the recommended daily fat intake (in grams) for a person consuming 2,000 calories per day, if 30% of their calories should come from fat. Use the formula $$\text{Fat grams} = \frac{\text{Total calories} \times \text{Percent fat}}{9}.$$

$$\frac{2000 \times 0.30}{9} = 66.7$$ grams

Question 1

Which of the following statements best describes the structural difference between saturated and unsaturated fatty acids?

Accepted Answer

Saturated fatty acids contain only single bonds between carbon atoms, while unsaturated fatty acids contain one or more double bonds.

Question 2

A triglyceride molecule is composed of which of the following components?

Accepted Answer

Three fatty acids and one glycerol molecule

Question 3

Which type of fatty acid is most likely to be solid at room temperature and why?

Accepted Answer

Saturated fatty acids, because their straight chains allow them to stack closely together.

Question 4

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

Accepted Answer

They are a major structural component of cell membranes.

Question 5

What is the role of bile in fat digestion?

Accepted Answer

Bile acts as an emulsifier, breaking large fat droplets into smaller ones to aid enzyme action.

Question 6

Which lipoprotein is responsible for transporting cholesterol from the arteries back to the liver for excretion?

Accepted Answer

High-density lipoprotein (HDL)

Question 7

Trans fats are created by which industrial process, and what is their impact on heart health?

Accepted Answer

Hydrogenation; they increase LDL cholesterol and are worse for heart health than saturated fats.

Question 8

Calculate the recommended daily fat intake (in grams) for a person consuming 2,000 calories per day, if 30% of their calories should come from fat. Use the formula $$	ext{Fat grams} = \frac{	ext{Total calories} 	imes 	ext{Percent fat}}{9}.$$

Accepted Answer

$$\frac{2000 	imes 0.30}{9} = 66.7$$ grams

Question 9

Which of the following dietary changes is most effective for lowering LDL cholesterol levels?

Accepted Answer

Consuming less saturated fat and trans fat

Question 10

A patient presents with dry, scaly skin and poor wound healing. Which essential fatty acid deficiency is most likely responsible?

Accepted Answer

Linoleic acid (omega-6)

Question 11

Which of the following foods is highest in monounsaturated fats and is recommended for heart health?

Accepted Answer

Olive oil

Question 12

Which statement about cholesterol is correct?

Accepted Answer

The body synthesizes all the cholesterol it needs; dietary cholesterol is not essential.

Question 13

Which of the following is a major risk factor for atherosclerosis and heart disease that can be modified by lifestyle changes?

Accepted Answer

High LDL cholesterol

Question 14

What is the primary function of chylomicrons in lipid transport?

Accepted Answer

They carry digested fat through the lymphatic system into the bloodstream.

Question 15

Which of the following best explains why polyunsaturated fatty acids are more prone to spoilage than saturated fatty acids?

Accepted Answer

Polyunsaturated fatty acids have multiple double bonds that are susceptible to oxidation.

Question 16

A food manufacturer wants to make a vegetable oil solid at room temperature. Which chemical process should they use, and what is a potential health risk?

Accepted Answer

Hydrogenation; it can create trans fats that increase heart disease risk.

Question 17

Which of the following is NOT a recommended strategy for maintaining healthy cholesterol levels?

Accepted Answer

Increasing intake of trans fats

Question 18

Which essential fatty acids are required in the diet, and what are their primary sources?

Accepted Answer

Linoleic acid (omega-6) and alpha-linolenic acid (omega-3); found in vegetable oils, nuts, and seeds

Question 19

A patient is advised to consume less than 10% of their daily calories from saturated fat. If their daily intake is 2,200 calories, what is the maximum recommended grams of saturated fat per day? Use the formula $$	ext{Saturated fat grams} = \frac{	ext{Total calories} 	imes 0.10}{9}.$$

Accepted Answer

$$\frac{2200 	imes 0.10}{9} = 24.4$$ grams

Question 20

Which of the following best describes the Mediterranean diet and its impact on heart health?

Accepted Answer

It emphasizes whole grains, fruits, vegetables, legumes, nuts, and olive oil, and is associated with lower risk of heart disease.

Lipids (nutrition)

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