Cell Membrane Review

What is the fluid mosaic model of the cell membrane?

• The fluid mosaic model of the cell membrane describes the structure and behavior of the cell membrane.

• The fluid mosaic model of the cell membrane describes the structure and behavior of the nucleus.

• The fluid mosaic model of the cell membrane is a rigid structure that does not allow for movement.

• The fluid mosaic model of the cell membrane is a model that only applies to plant cells.

What is the main component of the cell membrane?

• nucleic acids

• phospholipids

• proteins

• carbohydrates

What are the two layers of the cell membrane called?

• lipid bilayer

• protein bilayer

• cholesterol bilayer

• phospholipid bilayer

What is the function of membrane proteins?

• The function of membrane proteins is to store genetic information.

• The function of membrane proteins is to regulate body temperature.

• The function of membrane proteins is to produce energy for the cell.

• The function of membrane proteins is to transport molecules across the cell membrane, signal between cells, perform enzymatic activities, and facilitate cell adhesion.

What is selective permeability?

• Property of a membrane to allow only small molecules to pass through.

• Property of a membrane to allow certain substances to pass through while restricting the passage of others.

• Ability of a membrane to allow all substances to pass through freely.

• Property of a membrane to allow substances to pass through based on their size.

Which model describes the cell membrane as a fluid structure with various proteins embedded in it?

• Lipid Bilayer Model

• Fluid Mosaic Model

• Rigid Structure Model

• Protein Matrix Model

What are the functions of membrane proteins?

• Transport, cell recognition, enzymatic activity (chemical reactions)

• Structural support, energy production, waste removal

• DNA replication, protein synthesis, cell division

• Hormone production, immune response, cell communication

What does selective permeability mean in relation to the cell membrane?

• Property of the cell membrane that allows all substances to pass through.

• Property of the cell membrane that allows certain substances to pass through while restricting the passage of others.

• Property of the cell membrane that restricts the passage of all substances.

• Property of the cell membrane that allows the passage of substances randomly.

What are some factors that affect the permeability of the cell membrane?

• pH level, cell size, presence of enzymes

• light intensity, cell shape, presence of carbohydrates

• pressure, cell age, presence of nucleic acids

• concentration gradient, lipid composition, and presence of transport proteins.

Which molecules within the cell membrane provide some added structure and stability?

• cholesterol

• carbohydrates

• lipids