Plasma Membrane Quiz

What is the primary component of the plasma membrane?

• Phospholipids

• Nucleic acids

• Proteins

• Carbohydrates

Which part of the plasma membrane is hydrophobic?

• Fatty acid tails of phospholipids

• Phosphate heads of phospholipids

• Integral proteins

• Cholesterol molecules

Which of the following characteristics allows substances to pass through the phospholipid bilayer?

• Small and non-polar

• Large and polar

• Ions and charged particles

• Hydrophilic and large molecules

What type of transport occurs when a substance moves across the plasma membrane without the need for energy?

• Passive transport

• Active transport

• Bulk transport

• Facilitated transport

If a plant cell is placed in a hypertonic solution, what happens to the cell?

• The cell shrinks due to water loss

• The cell swells due to water gain

• The cell remains the same size

• The cell bursts

Which process describes the movement of water molecules across a semi-permeable membrane?

• Osmosis

• Diffusion

• Active transport

• Endocytosis