ACF Nutrition Principles 3

Question 1

What is the primary function of dietary fiber in the large intestine?

Accepted Answer

Serving as substrate for beneficial gut bacteria

Answer

Soluble and insoluble fibers are fermented by colonic microbiota, producing short-chain fatty acids that nourish colonocytes and support gut health.

Question 2

Which mineral is essential for oxygen transport in red blood cells?

Accepted Answer

Iron

Answer

Iron is a component of hemoglobin in red blood cells and myoglobin in muscle, both of which bind and transport oxygen.

Question 3

The thermic effect of food (TEF) is highest for which macronutrient?

Accepted Answer

Protein

Answer

Protein has the highest thermic effect (20–30%), meaning the body expends more energy digesting and metabolizing it compared to fat (0–3%) or carbohydrates (5–10%).

Question 4

Which compound gives chile peppers their pungency and has been linked to thermogenic effects?

Accepted Answer

Capsaicin

Answer

Capsaicin activates TRPV1 receptors and can temporarily increase metabolic rate and fat oxidation.

Question 5

What does the glycemic index (GI) measure?

Accepted Answer

How quickly blood glucose rises after consuming a food relative to glucose

Answer

GI ranks foods on a 0–100 scale based on how rapidly they raise blood glucose compared to pure glucose, which is set at 100.

(ACF) American Culinary Federation Certification Practice Test

(ACF) American Culinary Federation Certification Practice Test

ACF Nutrition Principles 3