Carbohydrates: Structure and Function

The video tutorial explains that carbohydrates are composed of carbon, hydrogen, and oxygen atoms. It explores the structure and composition of three major types of carbohydrates: sucrose, starch, and cellulose. Sucrose, commonly known as table sugar, has a specific chemical formula. Starch is a polymer made of glucose units, while cellulose, found in plant cell walls, also forms a polymer structure. The video concludes by summarizing the elements present in carbohydrates and their different arrangements.

What are the three elements that make up carbohydrates?

• Carbon, Hydrogen, Oxygen

• Hydrogen, Oxygen, Nitrogen

• Carbon, Oxygen, Sulfur

• Carbon, Nitrogen, Oxygen

Which of the following is a common example of a carbohydrate?

• Protein

• Water

• Salt

• Sucrose

What is the chemical formula for sucrose?

• C3H6O3

• C12H22O11

• C6H12O6

• C2H4O2

Starch is composed of which type of units?

• Galactose

• Fructose

• Lactose

• Glucose

Approximately how many glucose units make up starch?

• Between 100 and 200

• Between 200 and 400

• Between 300 and 600

• Between 600 and 800

What is the primary role of cellulose in plants?

• Energy storage

• Structural support

• Photosynthesis

• Nutrient transport

Cellulose is a polymer made up of which repeating units?

• Fructose

• Sucrose

• Glucose

• Galactose

Which element is not found in carbohydrates?

• Nitrogen

• Oxygen

• Hydrogen

• Carbon

What is the main difference between starch and cellulose?

• Starch is found in animals, cellulose in plants

• Starch is used for energy storage, cellulose for structural support

• Starch is a lipid, cellulose is a carbohydrate

• Starch is a protein, cellulose is a carbohydrate

Which of the following statements is true about carbohydrates?

• They are formed from carbon, sulfur, and oxygen

• They are composed of carbon, hydrogen, and oxygen

• They are made up of carbon, hydrogen, and nitrogen

• They consist of carbon, nitrogen, and oxygen