Quiz: Mastering Carbohydrates and Food Processing — 9 questions

1. What is a simple carbohydrate?

A. A carbohydrate that is only present in fruits and vegetables

B. A carbohydrate that is slow to digest and mainly composed of starches and fibers

C. A carbohydrate that is only found in processed foods like candies and sweets

D. A carbohydrate that is quickly digested and mainly composed of sugars

Answer: (D)

Explanation

Simple carbohydrates are characterized by their quick digestion and absorption, mainly consisting of sugars like glucose and fructose. They cause rapid increases in blood sugar levels.

2. What is the primary function of carbohydrates in the human body?

A. To serve as the body's main energy source.

B. To build muscle tissue.

C. To store genetic information.

D. To transport oxygen in blood.

Answer: (A)

Explanation

Carbohydrates are the main energy source, providing glucose needed for cellular functions. While they do not build muscle or store genetics, their primary role is energy provision.

3. What is the Glycemic Index value of pure glucose, which serves as the reference point for measuring other foods?

A. 75

B. 100

C. 0

D. 50

Answer: (B)

Explanation

Pure glucose has a Glycemic Index of 100, serving as the reference point against which other carbohydrate foods are measured. This value indicates that glucose causes the maximum rise in blood glucose levels compared to other foods.

4. Which of the following foods contains predominantly simple carbohydrates?

A. Brown rice

B. White bread

C. Wholegrain pasta

D. Lentils

Answer: (B)

Explanation

White bread is a quick-digesting food mainly composed of simple carbohydrates, unlike brown rice and wholegrain pasta which are rich in complex carbs.

5. What is the main role of carbohydrates in nutrition?

A. To provide the body's primary source of energy

B. To regulate body temperature

C. To carry oxygen to body cells

D. To build and repair body tissues

Answer: (A)

Explanation

Carbohydrates are primarily responsible for providing the body's main source of energy, as they are broken down into glucose, which fuels cellular functions.

6. What occurs during dextrinisation?

A. The breakdown of starch into sugars under dry heat, resulting in browning and flavor development.

B. The absorption of liquid by starch during heating, causing thickening.

C. The conversion of sugar into alcohol during fermentation.

D. The cooling of gelatinised starch to form gels.

Answer: (A)

Explanation

Dextrinisation involves dry heat breaking down starches, leading to browning and flavor changes. It is different from gelatinisation, which involves absorption of liquid.

7. Which storage method best prevents staleness in bread?

A. Storing in a paper bag or freezing.

B. Leaving it exposed on the counter.

C. Storing in a sealed plastic container at room temperature.

D. Keeping it in the refrigerator.

Answer: (A)

Explanation

Storing bread in paper bags or freezing it prevents staleness and preserves freshness by controlling moisture and preventing mold.

8. How does heating affect sugar in food during cooking?

A. It causes caramelisation, browning the sugar.

B. It dissolves and thickens the sugar into syrup.

C. It turns sugar into protein.

D. It causes dextrinisation, breaking down starches.

Answer: (A)

Explanation

Heating sugar causes caramelisation, which browns the sugar and develops flavor; dextrinisation refers to starch, not sugar.

9. What is a key difference between high GI and low GI foods?

A. High GI foods cause rapid blood glucose increases; low GI foods cause a gradual release.

B. High GI foods are always healthier than low GI foods.

C. Low GI foods are only found in processed foods.

D. High GI foods contain more fiber than low GI foods.

Answer: (A)

Explanation

High GI foods rapidly raise blood sugar levels, while low GI foods release energy more slowly; this affects blood sugar management.