Diffusion and Osmosis Quiz

What is the main difference between osmosis and diffusion?

• Diffusion only involves water, while osmosis transports all molecules.

• Osmosis only involves water, while diffusion transports other molecules.

• Osmosis requires energy, while diffusion does not.

• Diffusion moves water from low to high concentrations.

Which of the following describes passive transport?

• Movement that requires energy from the cell

• Movement against a concentration gradient

• Naturally occurring movement without using energy

• Movement of harmful materials into the cell

A semipermeable membrane:

• Allows all molecules to pass through

• Blocks all molecules from passing

• Allows some molecules to pass but not others

• Only allows harmful substances to pass

Diffusion occurs when molecules move:

• From low concentration to high concentration

• From high concentration to low concentration

• From areas of equal concentration to one side

• Only across semipermeable membranes

What happens when perfume is sprayed in a room?

• Osmosis occurs, spreading the scent

• Diffusion occurs, spreading the scent

• Passive transport only works near the bottle

• The perfume molecules move randomly without a pattern

Why is diffusion important for cells?

• It brings harmful substances into the cell

• It allows nutrients to enter and wastes to exit cells

• It uses energy to move substances

• It only moves water molecules

Osmosis is the movement of:

• All molecules

• Water molecules through a semipermeable membrane

• Molecules from low to high concentration

• Water and oxygen molecules at the same time

What is an example of osmosis in plants?

• Oxygen diffusing into leaves

• Water and minerals moving into roots

• Salt spreading in soil

• Nutrients moving in the bloodstream

When blood becomes oxygenated, what process is taking place?

• Osmosis

• Diffusion

• Active transport

• Endocytosis

Osmosis moves water molecules:

• From areas of low to high concentration

• Randomly across a membrane

• From areas of high to low concentration

• By using energy from the cell