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Biology Chapter 2 : Topic 6
Types of Carbohydrates
1 / 15
Which carbohydrate consists of a single sugar unit?
Reasoning: Glucose is a monosaccharide, meaning it contains only one sugar unit.
2 / 15
Which of the following is correctly classified as a disaccharide?
Reasoning: Sucrose is made of two monosaccharides joined together.
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A carbohydrate molecule contains hundreds of glucose units linked together. It is most likely a:
Reasoning: Polysaccharides are complex carbohydrates made of many sugar units.
4 / 15
Which set contains only monosaccharides?
Reasoning: Glucose, fructose, and galactose are all single-sugar molecules.
5 / 15
Which carbohydrate is mainly stored in plants as a reserve food material?
Reasoning: Starch is a polysaccharide used by plants for energy storage.
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Which statement correctly compares monosaccharides and polysaccharides?
Reasoning: Monosaccharides are the simplest carbohydrates; polysaccharides are complex chains.
7 / 15
Which carbohydrate is commonly known as milk sugar?
Reasoning: Lactose is a disaccharide found naturally in milk.
8 / 15
A student identifies a carbohydrate that provides immediate energy without needing to be broken down into smaller sugars. The carbohydrate is most likely:
Reasoning: Glucose is a monosaccharide and can be directly used by cells.
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Which of the following is a polysaccharide?
Reasoning: Glycogen is a storage polysaccharide found in animals.
10 / 15
Sucrose belongs to the disaccharides because it is formed by:
Reasoning: Disaccharides are composed of two monosaccharides joined together.
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Which sequence correctly shows increasing complexity of carbohydrates?
Reasoning: Carbohydrates become more complex as more sugar units are linked together.
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Which carbohydrate primarily serves a structural role in plant cell walls?
Reasoning: Cellulose is a structural polysaccharide present in plant cell walls.
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Which group contains one monosaccharide, one disaccharide, and one polysaccharide respectively?
Reasoning: Glucose is a monosaccharide, sucrose a disaccharide, and starch a polysaccharide.
14 / 15
During digestion, starch is eventually broken down into:
Reasoning: Starch is a polysaccharide composed of glucose units.
15 / 15
A carbohydrate sample is identified as being made of only two linked sugar molecules. It is classified as a:
Reasoning: Disaccharides consist of exactly two monosaccharide units joined together.
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