Plasma Membrane

What is the difference between active transport and passive transport?

• Active transport requires energy, while passive transport does not.

• Both active and passive transport require energy.

• Passive transport is faster than active transport.

• Active transport occurs only in plant cells.

What does the term hydrophilic mean?

• Water fearing.

• Water loving.

• Water neutral.

• Water resistant.

What is the role of glycoproteins in the plasma membrane?

• They provide structural support to the membrane.

• They act as enzymes to speed up chemical reactions.

• They play a key role in cell recognition and signaling.

• They transport molecules across the membrane.

What is the term for the maintaining of a biological balance, or sameness?

• Homeostasis

• Equilibrium

• Stability

• Symbiosis

What is the function of transport proteins in the plasma membrane?

• To facilitate the movement of substances across the membrane.

• To provide structural support to the membrane.

• To act as a barrier preventing all substances from entering the cell.

• To store nutrients and waste products within the cell.

What is the hydrophobic part of a phospholipid called?

• Hydrophilic head

• Hydrophobic tail

• Polar region

• Glycerol backbone

What is the significance of membrane proteins?

• They assist in communication, transport, and structural support.

• They are primarily responsible for energy production.

• They serve as a barrier to protect the cell from external factors.

• They are involved in the synthesis of DNA.

What is the term for the movement of molecules from an area of high concentration to an area of low concentration?

• Osmosis

• Diffusion

• Active Transport

• Facilitated Diffusion

What does selective permeability mean in the context of the plasma membrane?

• The plasma membrane allows all substances to pass freely.

• The plasma membrane allows certain substances to pass while blocking others.

• The plasma membrane is impermeable to all substances.

• The plasma membrane only allows water to pass through.

What is the hydrophilic part of a phospholipid called?

• Hydrophobic tail

• Hydrophilic head

• Phospholipid bilayer

• Fatty acid chain