Questions on Carbohydrates
20 multiple choice questions on Carbohydrates, suitable for middle or high school biology or nutrition students. The answers are listed at the end.
Multiple Choice Questions: Carbohydrates
1. What are carbohydrates primarily used for in the body?
A) Building muscle
B) Energy
C) Hormone regulation
D) DNA replication
2. What is the basic unit of carbohydrates?
A) Amino acid
B) Nucleotide
C) Monosaccharide
D) Fatty acid
3. Which of the following is a monosaccharide?
A) Sucrose
B) Glucose
C) Lactose
D) Starch
4. Which of these is a disaccharide?
A) Fructose
B) Glucose
C) Sucrose
D) Cellulose
5. Polysaccharides are composed of:
A) Many amino acids
B) Many nucleotides
C) Many monosaccharides
D) Many fatty acids
6. Which of the following is a polysaccharide?
A) Maltose
B) Glucose
C) Glycogen
D) Galactose
7. Which polysaccharide is used for energy storage in animals?
A) Starch
B) Glycogen
C) Cellulose
D) Fructose
8. Which polysaccharide is found in plant cell walls and provides structural support?
A) Starch
B) Glycogen
C) Cellulose
D) Lactose
9. Which of the following is NOT a carbohydrate?
A) Starch
B) Glucose
C) Protein
D) Sucrose
10. What is the main function of dietary fiber (cellulose) in the human body?
A) Build muscle
B) Provide quick energy
C) Aid digestion
D) Store fat
11. Sucrose is made of:
A) Glucose + Glucose
B) Glucose + Fructose
C) Glucose + Galactose
D) Fructose + Fructose
12. Lactose is composed of:
A) Glucose + Fructose
B) Glucose + Galactose
C) Glucose + Glucose
D) Fructose + Galactose
13. Which enzyme helps break down starch into sugar in the mouth?
A) Lactase
B) Amylase
C) Protease
D) Lipase
14. Which of the following carbohydrates cannot be digested by humans?
A) Starch
B) Sucrose
C) Glucose
D) Cellulose
15. Which carbohydrate is known as "blood sugar"?
A) Fructose
B) Sucrose
C) Glucose
D) Lactose
16. Which of the following is a source of complex carbohydrates?
A) Table sugar
B) Candy
C) Brown rice
D) Soda
17. Carbohydrates contain which elements?
A) C, H, O
B) C, H, N
C) C, H, O, N
D) C, O, N
18. Which of the following is an example of a refined carbohydrate?
A) Apple
B) Whole grain bread
C) White bread
D) Lentils
19. Which type of carbohydrate is broken down the fastest by the body?
A) Monosaccharides
B) Polysaccharides
C) Disaccharides
D) Dietary fiber
20. Which hormone regulates blood glucose levels?
A) Insulin
B) Glucagon
C) Estrogen
D) Both A and B
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Answer Key
1. B) Energy
2. C) Monosaccharide
3. B) Glucose
4. C) Sucrose
5. C) Many monosaccharides
6. C) Glycogen
7. B) Glycogen
8. C) Cellulose
9. C) Protein
10. C) Aid digestion
11. B) Glucose + Fructose
12. B) Glucose + Galactose
13. B) Amylase
14. D) Cellulose
15. C) Glucose
16. C) Brown rice
17. A) C, H, O
18. C) White bread
19. A) Monosaccharides
20. D) Both A and B
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