Exploring the Plasma Membrane

What is the main component of the plasma membrane that was discussed?

• Carbohydrates

• Phospholipids

• Proteins

• Nucleic acids

What property of phospholipids allows them to form a bilayer in the plasma membrane?

• Only hydrophobic

• Neither hydrophilic nor hydrophobic

• Both hydrophilic and hydrophobic

• Only hydrophilic

Who developed the currently accepted model of the cell membrane?

• Darwin and Wallace

• Mendel and Morgan

• Singer and Nicolson

• Watson and Crick

What is the name of the model that describes the plasma membrane's structure?

• Solid State Model

• Dynamic Equilibrium Model

• Fluid Mosaic Model

• Rigid Layer Model

How do glycoproteins function in the immune system?

• They transport lipids.

• They replicate viral DNA.

• They act as enzymes.

• They serve as identification markers.

What is the process called when water moves through a cell's membrane?

• Active transport

• Dialysis

• Osmosis

• Filtration

What type of movement is utilized in passive transport?

• Electrical movement

• Brownian movement

• Quantum movement

• Cyclic movement

What does the plasma membrane's selective permeability allow?

• Selective entrance and exit of materials

• Unrestricted movement of all substances

• Only water to pass through

• Only proteins to enter

What is diffusion defined as in the context of cellular processes?

• Movement from low to high concentration

• Movement of water molecules only

• Random movement of gases only

• Movement from high to low concentration

Why are processes like osmosis and dialysis crucial for a cell?

• They generate energy for the cell.

• They allow the cell to communicate.

• They enable nutrient intake and waste removal.

• They protect the cell from pathogens.