Q 01/05

Which of these nutrients is classed as a macronutrient?

A) Carbohydrates

B) Vitamin B12

C) Vitamin C

D) Selenium

Answer · why

A) Carbohydrates

Carbohydrates, protein and fat are the macronutrients because the body needs them by the gram, mainly for energy; vitamins and trace minerals are need...

Q 02/05

What is a primary function of protein in the human body?

A) Providing quick energy

B) Storing genetic information

C) Regulating body temperature

D) Building and repairing tissues

Answer · why

D) Building and repairing tissues

Building and repairing tissues is protein's central job: the body is always breaking its own proteins down and making new ones, so it needs a fresh su...

Q 03/05

Which of these foods ranks lowest on the glycemic index, where glucose scores 100?

A) White bread

B) Lentils

C) Cornflakes

D) White rice

Answer · why

B) Lentils

Lentils score about 30, well under half the figure for cornflakes or white bread, because their starch is digested slowly, so blood sugar rises gently...

Q 04/05

Which type of fat is generally associated with benefits for heart health?

A) Saturated fat

B) Monounsaturated fat

C) Trans fat

D) Hydrogenated fat

Answer · why

B) Monounsaturated fat

Monounsaturated fat helps lower 'bad' cholesterol when it takes the place of saturated fat, which is why heart advice is to swap butter and other soli...

Q 05/05

What is a key role of dietary fiber in the digestive system?

A) Promoting regular bowel movements

B) Providing direct energy

C) Absorbing fat-soluble vitamins

D) Building muscle tissue

Answer · why

A) Promoting regular bowel movements

Promoting regular bowel movements is fiber's best-known job: the body cannot digest it, so it adds bulk to the stool and helps it pass, which prevents...