Carbohydrates: Structure and Function

Carbohydrates are essential organic compounds made of carbon, hydrogen, and oxygen. They play a crucial role in providing structure and energy to living organisms. Structurally, carbohydrates like cellulose support plant cells and other organisms. Energetically, they supply and store energy, with excess stored as glycogen in the liver and muscles. Carbohydrates are found in foods like grains, starches, and sugars, which provide varying types and amounts of energy. Understanding carbohydrates helps in identifying their sources in our diet.

What are the three elements that make up carbohydrates?

• Carbon, Nitrogen, Oxygen

• Carbon, Hydrogen, Nitrogen

• Carbon, Oxygen, Nitrogen

• Carbon, Hydrogen, Oxygen

Which structural carbohydrate is vital to plant cells?

• Cellulose

• Starch

• Chitin

• Glycogen

Which carbohydrate is found in the shells of crustaceans?

• Starch

• Chitin

• Glycogen

• Cellulose

What is the role of cellulose in nature?

• To transport nutrients

• To provide structure

• To store energy

• To produce oxygen

Where is extra energy from carbohydrates stored in the human body?

• In the brain

• In the lungs

• In the liver and muscles

• In the heart

What is the primary role of carbohydrates in living organisms?

• Store minerals

• Build proteins

• Supply energy

• Provide vitamins

Which of the following is a source of carbohydrates?

• Bread

• Eggs

• Fish

• Meat

Which of the following foods is NOT rich in carbohydrates?

• Bread

• Fruit

• Candy

• Fish

What type of carbohydrate is stored in plants for energy?

• Glycogen

• Chitin

• Cellulose

• Starch

How do carbohydrates store energy at the molecular level?

• By keeping energy in molecular bonds

• By creating large crystals

• By dissolving in water

• By forming short chains