Q. What is the general formula for carbohydrates?
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A.
C_n(H2O)_n
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B.
C_nH_nO_n
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C.
C_nH_2nO_n
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D.
C_nH_2O_n
Solution
The general formula for carbohydrates is C_n(H2O)_n, indicating that they are hydrates of carbon.
Correct Answer: A — C_n(H2O)_n
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Q. What is the main function of carbohydrates in living organisms?
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A.
Genetic information
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B.
Energy storage
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C.
Catalysis
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D.
Structural support
Solution
The main function of carbohydrates is energy storage and providing energy to living organisms.
Correct Answer: B — Energy storage
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Q. What is the main storage form of carbohydrates in animals?
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A.
Starch
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B.
Glycogen
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C.
Cellulose
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D.
Chitin
Solution
Glycogen is the main storage form of carbohydrates in animals, while starch is the storage form in plants.
Correct Answer: B — Glycogen
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Q. What is the main structural component of plant cell walls?
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A.
Starch
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B.
Glycogen
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C.
Cellulose
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D.
Chitin
Solution
Cellulose is the main structural component of plant cell walls.
Correct Answer: C — Cellulose
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Q. What is the molecular formula of fructose?
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A.
C6H12O6
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B.
C5H10O5
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C.
C6H10O5
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D.
C5H12O6
Solution
Fructose has the same molecular formula as glucose, which is C6H12O6.
Correct Answer: A — C6H12O6
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Q. What is the primary function of carbohydrates in living organisms?
-
A.
Energy storage
-
B.
Genetic information
-
C.
Catalysis
-
D.
Structural support
Solution
Carbohydrates primarily serve as a source of energy in living organisms.
Correct Answer: A — Energy storage
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Q. What is the primary storage form of carbohydrates in animals?
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A.
Starch
-
B.
Glycogen
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C.
Cellulose
-
D.
Chitin
Solution
Glycogen is the primary storage form of carbohydrates in animals.
Correct Answer: B — Glycogen
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Q. What is the primary structural component of plant cell walls?
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A.
Starch
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B.
Glycogen
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C.
Cellulose
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D.
Chitin
Solution
Cellulose is the primary structural component of plant cell walls, providing rigidity and strength.
Correct Answer: C — Cellulose
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Q. What is the simplest form of carbohydrate?
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A.
Disaccharide
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B.
Monosaccharide
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C.
Polysaccharide
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D.
Oligosaccharide
Solution
The simplest form of carbohydrate is a monosaccharide, which cannot be hydrolyzed into simpler sugars.
Correct Answer: B — Monosaccharide
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Q. What type of bond links monosaccharides in a disaccharide?
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A.
Ionic bond
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B.
Covalent bond
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C.
Hydrogen bond
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D.
Van der Waals bond
Solution
Monosaccharides in a disaccharide are linked by a covalent bond known as a glycosidic bond.
Correct Answer: B — Covalent bond
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Q. What type of bond links monosaccharides in polysaccharides?
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A.
Ionic bond
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B.
Covalent bond
-
C.
Hydrogen bond
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D.
Van der Waals forces
Solution
Monosaccharides are linked by glycosidic bonds, which are a type of covalent bond.
Correct Answer: B — Covalent bond
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Q. What type of carbohydrate is starch?
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A.
Monosaccharide
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B.
Disaccharide
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C.
Oligosaccharide
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D.
Polysaccharide
Solution
Starch is classified as a polysaccharide, consisting of many glucose units.
Correct Answer: D — Polysaccharide
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Q. What type of carbohydrate is sucrose?
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A.
Monosaccharide
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B.
Disaccharide
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C.
Oligosaccharide
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D.
Polysaccharide
Solution
Sucrose is a disaccharide composed of glucose and fructose.
Correct Answer: B — Disaccharide
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Q. Which carbohydrate is a structural component of plant cell walls?
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A.
Starch
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B.
Glycogen
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C.
Cellulose
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D.
Fructose
Solution
Cellulose is a polysaccharide that provides structural support in plant cell walls.
Correct Answer: C — Cellulose
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Q. Which carbohydrate is commonly used as a sweetener?
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A.
Lactose
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B.
Maltose
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C.
Fructose
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D.
Cellulose
Solution
Fructose is commonly used as a sweetener due to its high sweetness level.
Correct Answer: C — Fructose
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Q. Which carbohydrate is found in milk?
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A.
Lactose
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B.
Maltose
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C.
Glucose
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D.
Fructose
Solution
Lactose is the sugar found in milk, composed of glucose and galactose.
Correct Answer: A — Lactose
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Q. Which carbohydrate is found in the structure of DNA?
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A.
Glucose
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B.
Ribose
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C.
Fructose
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D.
Mannose
Solution
Ribose is the sugar component of RNA, while deoxyribose is found in DNA.
Correct Answer: B — Ribose
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Q. Which carbohydrate is known as blood sugar?
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A.
Galactose
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B.
Fructose
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C.
Glucose
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D.
Ribose
Solution
Glucose is commonly referred to as blood sugar as it is the primary energy source for the body's cells.
Correct Answer: C — Glucose
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Q. Which carbohydrate is primarily stored in animal liver and muscle?
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A.
Cellulose
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B.
Starch
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C.
Glycogen
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D.
Fructose
Solution
Glycogen is the carbohydrate primarily stored in animal liver and muscle as a form of energy reserve.
Correct Answer: C — Glycogen
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Q. Which enzyme breaks down starch into glucose?
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A.
Amylase
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B.
Lactase
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C.
Sucrase
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D.
Cellulase
Solution
Amylase is the enzyme that catalyzes the hydrolysis of starch into glucose.
Correct Answer: A — Amylase
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Q. Which enzyme is responsible for the hydrolysis of starch?
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A.
Amylase
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B.
Cellulase
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C.
Lactase
-
D.
Maltase
Solution
Amylase is the enzyme that catalyzes the hydrolysis of starch into sugars.
Correct Answer: A — Amylase
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Q. Which of the following carbohydrates is a disaccharide?
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A.
Maltose
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B.
Ribose
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C.
Cellulose
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D.
Glycogen
Solution
Maltose is a disaccharide formed from two glucose units.
Correct Answer: A — Maltose
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Q. Which of the following carbohydrates is a ketose?
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A.
Glucose
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B.
Fructose
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C.
Galactose
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D.
Mannose
Solution
Fructose is a ketose sugar, while glucose and galactose are aldoses.
Correct Answer: B — Fructose
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Q. Which of the following carbohydrates is a reducing sugar?
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A.
Fructose
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B.
Sucrose
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C.
Maltose
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D.
Cellulose
Solution
Maltose is a reducing sugar because it has a free aldehyde or ketone group, while sucrose does not.
Correct Answer: C — Maltose
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Q. Which of the following carbohydrates is not digestible by humans?
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A.
Starch
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B.
Glycogen
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C.
Cellulose
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D.
Maltose
Solution
Cellulose is not digestible by humans due to the lack of enzymes to break it down.
Correct Answer: C — Cellulose
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Q. Which of the following is a characteristic of carbohydrates?
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A.
High energy density
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B.
Soluble in organic solvents
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C.
Hydrophilic nature
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D.
Insoluble in water
Solution
Carbohydrates are generally hydrophilic, meaning they are soluble in water.
Correct Answer: C — Hydrophilic nature
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Q. Which of the following is a characteristic of cellulose?
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A.
Soluble in water
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B.
Composed of glucose units
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C.
Used for energy storage
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D.
Contains α-1,4 glycosidic bonds
Solution
Cellulose is composed of glucose units linked by β-1,4 glycosidic bonds and is not soluble in water.
Correct Answer: B — Composed of glucose units
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Q. Which of the following is a characteristic of starch?
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A.
Soluble in water
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B.
Linear structure
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C.
Branched structure
-
D.
Sweet taste
Solution
Starch has a branched structure, which allows it to store energy efficiently.
Correct Answer: C — Branched structure
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Q. Which of the following is a polysaccharide?
-
A.
Glucose
-
B.
Fructose
-
C.
Cellulose
-
D.
Galactose
Solution
Cellulose is a polysaccharide made up of long chains of glucose units.
Correct Answer: C — Cellulose
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Q. Which of the following is a reducing sugar?
-
A.
Fructose
-
B.
Sucrose
-
C.
Starch
-
D.
Cellulose
Solution
Fructose is a reducing sugar, while sucrose, starch, and cellulose are not.
Correct Answer: A — Fructose
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