Questions: Macronutrients: Carbohydrates, Protein, and Fat

Question 1

A student says 'I'm cutting out all fat from my diet to be healthier.' Why is this a bad idea?

• A. Fat tastes good, so removing it makes food boring
• B. Your body needs fat to absorb certain vitamins, protect organs, and store energy
• C. Fat is the only source of calories in food
• D. Without fat, carbohydrates stop working

Answer: (B)

Fat is an essential macronutrient. Your body needs it to absorb fat-soluble vitamins (A, D, E, K), to cushion and protect internal organs, and to store energy for when food isn't available. Eliminating all fat would deprive your body of these critical functions. The goal is eating the right types and amounts of fat, not eliminating it entirely.

Question 2

Carbohydrates are primarily found in foods that taste sweet or starchy, like candy and bread.

• T. True
• F. False

Answer: False

Carbohydrates are in many foods that don't taste sweet or obviously starchy. Fruits, vegetables, milk, yogurt, and beans all contain significant carbohydrates. The sugar in milk (lactose) is a carbohydrate, and the fiber in vegetables is also a type of carbohydrate. Carbs are much more widespread in the food supply than most people realize.

Question 3

What is the main role of protein in your body, and why does this make it especially important for growing children?

Model answer: Protein provides amino acids that your body uses to build and repair tissues like muscle, skin, and organs. Growing children need extra protein because they are constantly building new tissue as they get taller and bigger, not just repairing what they already have.

Protein's primary role is structural -- it builds and maintains body tissues. While adults mainly need protein for repair and maintenance, children and teens are actively growing, which means they need protein both for maintaining existing tissue and for constructing entirely new tissue. This is why protein needs per pound of body weight are higher in childhood than in adulthood.