Biological Macromolecules and Their Functions

The video tutorial discusses various chemical compounds found in cells, including carbon dioxide and water. It introduces organic compounds, highlighting carbohydrates, lipids, proteins, and nucleic acids. Carbohydrates are energy-rich compounds found in sugars and starches. Lipids, such as fats and oils, store energy for later use. Proteins are large molecules essential for various functions, while nucleic acids like DNA contain instructions for cellular activities.

What is the composition of a carbon dioxide molecule?

• Two atoms of carbon and one atom of oxygen

• Two atoms of carbon and two atoms of oxygen

• One atom of carbon and one atom of oxygen

• One atom of carbon and two atoms of oxygen

Which of the following is an example of a carbohydrate?

• Proteins

• Sugars

• Fats

• Waxes

What are complex carbohydrates made of?

• Simple molecules of water

• Large molecules of sugars

• Small molecules of proteins

• Chains of lipids

Which of the following is NOT a characteristic of lipids?

• Contain more energy than carbohydrates

• Energy-rich

• Made of nitrogen and phosphorus

• Made of carbon, hydrogen, and oxygen

What is the primary function of lipids in cells?

• Provide structural support

• Store energy for later use

• Catalyze chemical reactions

• Transmit genetic information

Which element is sometimes found in proteins but not in carbohydrates or lipids?

• Phosphorus

• Sulfur

• Calcium

• Magnesium

Which of the following foods is high in protein?

• Pasta

• Rice

• Potatoes

• Beans

What elements make up nucleic acids?

• Carbon, hydrogen, oxygen, nitrogen, and sulfur

• Carbon, hydrogen, oxygen, nitrogen, and phosphorus

• Carbon, hydrogen, and oxygen

• Carbon, hydrogen, oxygen, and nitrogen

What is the role of DNA in cells?

• Catalyze chemical reactions

• Provide structural support

• Direct all cell functions

• Store energy

Which type of organic compound contains the instructions for cellular functions?

• Proteins

• Carbohydrates

• Nucleic acids

• Lipids