Exploring the Structure and Function of the Cell Membrane

The video explains the structure and function of the cell membrane, highlighting its composition of lipids and proteins. It describes the membrane's selective permeability, allowing certain molecules to pass while blocking others. The roles of fibrous and globular proteins in communication and transport are detailed, along with the importance of cholesterol in maintaining membrane integrity. The video emphasizes the cell membrane's critical role in protecting the cell and facilitating essential life processes.

What is the primary function of the cell membrane?

• To synthesize proteins

• To store genetic information

• To protect the cell from its surroundings

• To produce energy for the cell

What are the main components of the cell membrane?

• Proteins and nucleic acids

• Carbohydrates and nucleic acids

• Lipids and proteins

• Carbohydrates and lipids

What is the role of lipids in the cell membrane?

• To synthesize proteins

• To make the membrane flexible

• To provide energy

• To store genetic information

Which type of protein helps give the cell support and shape?

• Globular proteins

• Peripheral proteins

• Channel proteins

• Fibrous proteins

What type of substances can pass through the cell membrane without assistance?

• Ions

• Large molecules

• Water-soluble substances

• Lipid-soluble substances

What is the function of channel proteins in the cell membrane?

• To transport lipid-soluble substances

• To provide structural support

• To selectively transport ions and nutrients

• To form pores for water molecules

What is the significance of the cell membrane's selective permeability?

• It allows all substances to enter the cell

• It only allows water to pass through

• It prevents all substances from entering the cell

• It allows certain substances to pass while blocking others

Tags

NGSS.HS-LS1-3

What is the role of cholesterol in animal cell membranes?

• To synthesize proteins

• To strengthen the membrane wall

• To store energy

• To store genetic information

Which molecules help make the cell membrane impermeable to water-soluble substances?

• Proteins and carbohydrates

• Lipids and proteins

• Cholesterol and phospholipids

• Nucleic acids and lipids

What is the main function of glycoproteins in the cell membrane?

• To provide energy

• To identify the cell

• To synthesize proteins

• To store genetic information