Biology ยท Chemistry

Carbohydrates and Biomolecules

986 Questions

Carbohydrates and biomolecules questions test your understanding of sugars, monosaccharides, and metabolic substrates. The topic covers food transportation in plants and the biochemical properties of sweeteners. Practicing these questions builds a strong foundation for exam preparation.

Disaccharides and monosaccharidesArtificial sweetenersGlycogen storagePlant food transportGlycoprotein hormones

Carbohydrates and Biomolecules Questions

Multiple choice

Which of the following is a monosaccharide?

  1. Glucose

  2. Fructose

  3. Starch

  4. Sucrose
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glucose is a monosaccharide, which is a simple sugar that cannot be broken down into smaller sugars.

Multiple choice

Which of the following is a disaccharide?

  1. Glucose

  2. Fructose

  3. Starch

  4. Sucrose
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sucrose is a disaccharide, which is a sugar made up of two monosaccharides.

Multiple choice

What is the storage form of carbohydrates in animals?

  1. Glucose

  2. Fructose

  3. Starch

  4. Glycogen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Glycogen is the storage form of carbohydrates in animals.

Multiple choice

What is the process by which plants convert sunlight into carbohydrates?

  1. Photosynthesis

  2. Cellular Respiration

  3. Glycolysis

  4. Gluconeogenesis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Photosynthesis is the process by which plants convert sunlight into carbohydrates.

Multiple choice

Which of the following is a structural carbohydrate?

  1. Glucose

  2. Fructose

  3. Starch

  4. Cellulose
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cellulose is a structural carbohydrate, which is used to build the cell walls of plants.

Multiple choice

What is the chemical formula of fructose?

  1. C6H12O6

  2. C12H22O11

  3. C18H32O16

  4. C24H42O21
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The chemical formula of fructose is C6H12O6.

Multiple choice

Which of the following is a sugar alcohol?

  1. Glucose

  2. Fructose

  3. Sorbitol

  4. Sucrose
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sorbitol is a sugar alcohol, which is a type of carbohydrate that has a similar structure to sugar but is not as sweet.

Multiple choice

Which of the following is a complex carbohydrate?

  1. Glucose

  2. Fructose

  3. Starch

  4. Sucrose
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Starch is a complex carbohydrate, which is made up of many sugar units.

Multiple choice

What is the process of glycogen breakdown called?

  1. Glycogenesis

  2. Glycogenolysis

  3. Gluconeogenesis

  4. Glycolysis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glycogenolysis is the process by which glycogen is broken down into glucose molecules.

Multiple choice

What enzyme is responsible for the initial step of glycogenolysis?

  1. Glycogen phosphorylase

  2. Glucose-6-phosphatase

  3. Hexokinase

  4. Phosphofructokinase
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glycogen phosphorylase is the enzyme responsible for the initial step of glycogenolysis, which is the removal of glucose molecules from glycogen.

Multiple choice

What is the end product of glycogenolysis?

  1. Glucose-1-phosphate

  2. Glucose-6-phosphate

  3. Glucose

  4. Pyruvate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The end product of glycogenolysis is glucose, which can be used for energy production or stored in the blood for later use.

Multiple choice

What is the role of glucose-6-phosphatase in glycogenolysis?

  1. It removes glucose molecules from glycogen.

  2. It converts glucose-1-phosphate to glucose-6-phosphate.

  3. It hydrolyzes glucose-6-phosphate to glucose.

  4. It converts glucose to glycogen.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Glucose-6-phosphatase is the enzyme that hydrolyzes glucose-6-phosphate to glucose, which is the final step of glycogenolysis.

Multiple choice

What is the difference between glycogenolysis and gluconeogenesis?

  1. Glycogenolysis breaks down glycogen, while gluconeogenesis synthesizes glucose from non-carbohydrate precursors.

  2. Glycogenolysis occurs in the liver, while gluconeogenesis occurs in the muscle.

  3. Glycogenolysis is stimulated by glucagon, while gluconeogenesis is stimulated by insulin.

  4. Glycogenolysis produces glucose-6-phosphate, while gluconeogenesis produces glucose.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glycogenolysis breaks down glycogen into glucose, while gluconeogenesis synthesizes glucose from non-carbohydrate precursors, such as amino acids and lactate.

Multiple choice

What is the process of glycogen synthesis called?

  1. Glycogenesis

  2. Glycogenolysis

  3. Gluconeogenesis

  4. Glycolysis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glycogenesis is the process by which glucose is converted into glycogen and stored in the liver and muscles.

Multiple choice

Which enzyme is responsible for the breakdown of glycogen into glucose?

  1. Glycogen phosphorylase

  2. Glycogen synthase

  3. Glucose-6-phosphatase

  4. Hexokinase
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glycogen phosphorylase catalyzes the breakdown of glycogen into glucose-1-phosphate.