BIOD 121 Module 2 Test Prep | Carbohydrates, Sugars & Energy Metabolism | Practice Questions 150 Questions

BIOD 121 Module 2 Test Prep | Carbohydrates, Sugars &
Energy Metabolism | Practice Questions
150 Questions — Review Set


Question 1
Carbohydrates are composed primarily of which three elements?
✓ A. Carbon, hydrogen, oxygen
B. Carbon, nitrogen, sulfur
C. Hydrogen, nitrogen, phosphorus
D. Carbon, oxygen, phosphorus
Correct Answer: A. Carbon, hydrogen, oxygen
Feedback: Carbohydrates are composed of carbon, hydrogen, and oxygen atoms.

Question 2
Which is the simplest form of carbohydrate?
A. Polysaccharide
✓ B. Monosaccharide
C. Disaccharide
D. Fiber
Correct Answer: B. Monosaccharide
Feedback: Monosaccharides, such as glucose, are the simplest single-sugar units of carbohydrate.

Question 3
Which of the following is a monosaccharide?
A. Sucrose
B. Lactose
✓ C. Glucose
D. Starch
Correct Answer: C. Glucose
Feedback: Glucose is a monosaccharide, a single sugar unit that serves as the body's primary fuel
source.

Question 4
Which two monosaccharides combine to form sucrose?
✓ A. Glucose and fructose

, B. Glucose and galactose
C. Fructose and galactose
D. Glucose and glucose
Correct Answer: A. Glucose and fructose
Feedback: Sucrose (table sugar) is a disaccharide formed from glucose and fructose.

Question 5
Which two monosaccharides combine to form lactose?
A. Glucose and fructose
✓ B. Glucose and galactose
C. Fructose and galactose
D. Two glucose molecules
Correct Answer: B. Glucose and galactose
Feedback: Lactose, found in milk, is composed of glucose and galactose.

Question 6
Which two monosaccharides combine to form maltose?
✓ A. Glucose and glucose
B. Glucose and fructose
C. Glucose and galactose
D. Fructose and fructose
Correct Answer: A. Glucose and glucose
Feedback: Maltose is a disaccharide formed from two glucose molecules, often produced during starch
digestion.

Question 7
Which monosaccharide is found abundantly in fruit and honey?
A. Galactose
✓ B. Fructose
C. Sucrose
D. Maltose
Correct Answer: B. Fructose
Feedback: Fructose is the naturally occurring sugar found in high concentrations in fruit and honey.

Question 8
Which monosaccharide is a component of milk sugar but rarely found free in nature?

, A. Fructose
✓ B. Galactose
C. Glucose
D. Maltose
Correct Answer: B. Galactose
Feedback: Galactose is primarily found bound to glucose as lactose in milk, rarely occurring free.

Question 9
Polysaccharides are composed of:
A. Two sugar units
✓ B. Many linked monosaccharide units
C. No sugar units
D. Only fat molecules
Correct Answer: B. Many linked monosaccharide units
Feedback: Polysaccharides are long chains of many monosaccharide units linked together.

Question 10
Which of the following is an example of a polysaccharide?
A. Glucose
B. Sucrose
✓ C. Starch
D. Fructose
Correct Answer: C. Starch
Feedback: Starch is a polysaccharide composed of many glucose units, serving as the plant storage
form of carbohydrate.

Question 11
Starch is the storage form of carbohydrate in which organism type?
A. Animals
✓ B. Plants
C. Bacteria only
D. Fungi only
Correct Answer: B. Plants
Feedback: Starch is the primary storage carbohydrate in plants.

Question 12

, Glycogen is the storage form of carbohydrate in which organism type?
A. Plants
✓ B. Animals
C. Bacteria
D. Fungi
Correct Answer: B. Animals
Feedback: Glycogen is the storage form of glucose in animals, stored mainly in the liver and muscles.

Question 13
Where in the body is glycogen primarily stored?
✓ A. Liver and muscle
B. Adipose tissue only
C. Brain only
D. Skin
Correct Answer: A. Liver and muscle
Feedback: Glycogen is primarily stored in the liver and skeletal muscle tissue.

Question 14
Dietary fiber is a type of carbohydrate that:
A. Is fully digested and absorbed
✓ B. Resists digestion by human enzymes
C. Provides 9 kcal per gram
D. Is only found in animal products
Correct Answer: B. Resists digestion by human enzymes
Feedback: Fiber resists digestion by human digestive enzymes and passes largely intact through the GI
tract.

Question 15
Cellulose is an example of which type of carbohydrate?
A. Digestible starch
✓ B. Insoluble dietary fiber
C. A monosaccharide
D. A disaccharide
Correct Answer: B. Insoluble dietary fiber
Feedback: Cellulose is an insoluble plant fiber that humans cannot digest due to the type of glycosidic
bond.