Cell Membrane and Metabolism Quiz

What is the primary structure of the plasma membrane?

• Protein layer

• Phospholipid bilayer

• Carbohydrate layer

• Cholesterol layer

Who first proposed the fluid mosaic model of the plasma membrane?

• Robert Hooke

• Lynn Margulis

• J.J. Thomson

• S.J. Singer and Garth L. Nicolson

Which type of molecules pass through the lipid bilayer rapidly?

• Hydrophilic molecules

• Large polar molecules

• Hydrophobic molecules

• Ionic molecules

What role do transport proteins play in the plasma membrane?

• They provide structural support.

• They assist in the transport of specific molecules.

• They store energy.

• They act as receptors.

What is the function of cholesterol in the plasma membrane?

• Increases membrane rigidity

• Acts as a transport protein

• Decreases membrane fluidity

• Maintains membrane flexibility

What is the process of water movement across a selectively permeable membrane called?

• Diffusion

• Osmosis

• Facilitated diffusion

• Active transport

What happens to a cell placed in a hypertonic solution?

• It remains the same size.

• It shrinks.

• It bursts.

• It swells.

Which of the following is an example of active transport?

• Diffusion

• Facilitated diffusion

• Sodium-potassium pump

• Osmosis

What is the primary energy currency of the cell?

• NADH

• ATP

• FADH2

• ADP

What type of reaction is cellular respiration classified as?

• Catabolic

• Anabolic

• Exergonic

• Endergonic