Cell Membrane Transport Quiz

What is the primary function of microtubules in cells?

• To synthesize proteins

• To provide structural support

• To transport organelles and substances

• To store genetic information

What type of diffusion does not require assistance from proteins?

• Facilitated diffusion

• Active transport

• Unassisted diffusion

• Endocytosis

In which environment will a cell lose water and shrink?

• Isotonic

• Hypotonic

• Hypertonic

• Equilibrium

What is the main characteristic of facilitated diffusion?

• It is a form of active transport

• It requires energy

• It involves protein assistance

• It occurs against a concentration gradient

What type of protein channels are most commonly used by ions?

• Receptors

• Carriers

• Pumps

• Channels

What is the role of the Sodium Potassium pump?

• To transport glucose

• To maintain ion balance across the membrane

• To synthesize ATP

• To facilitate passive transport

What happens to water molecules during osmosis?

• They remain stationary

• They evaporate

• They move from low to high concentration

• They move from high to low concentration

What is the primary energy source for active transport mechanisms?

• Glucose

• ATP

• NADH

• FADH2

What defines a hypotonic environment?

• Lower solute concentration outside the cell

• Higher water concentration inside the cell

• Equal solute concentration inside and outside the cell

• Higher solute concentration outside the cell

Which of the following describes passive transport?

• Moves substances against their concentration gradient

• Occurs along a concentration gradient

• Requires energy input

• Involves vesicle formation