Principles of Diffusion and Osmosis Quiz

Test your understanding of diffusion, osmosis, factors affecting rate, and their biological significance with these cell biology quiz questions.

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Which of the following best describes diffusion?

Movement of molecules from high concentration to low concentration

Movement of molecules from low concentration to high concentration

Movement of molecules without any gradient

Movement of molecules in a circular pattern

What is osmosis?

Movement of water from low concentration to high concentration

Movement of water from high concentration to low concentration

Movement of solute from high concentration to low concentration

Movement of solute from low concentration to high concentration

What is the driving force behind diffusion and osmosis?

Gravity

Chemical energy

Electrical energy

Concentration gradient

Which of the following describes hypertonic solution?

The solution has a higher solute concentration compared to another solution

The solution has a lower solute concentration compared to another solution

The solution has an equal solute concentration compared to another solution

The solution has no solutes dissolved in it

Which of the following factors does NOT affect the rate of diffusion?

Temperature

Particle size

Surface area

Density of the solvent

Which of the following factors affects the rate of diffusion?

Temperature

Pressure

Particle size

All of the above

What is the significance of osmotic pressure?

It helps maintain cell shape

It helps in active transport

It helps in passive transport

It is not significant in biological systems

What is facilitated diffusion?

Movement of molecules from low to high concentration with the help of ATP

Movement of molecules from high to low concentration with the help of carrier proteins

Movement of molecules from low to high concentration without any assistance

Movement of molecules from high to low concentration through simple diffusion

How does molecular size affect the rate of diffusion?

Smaller molecules diffuse faster than larger molecules

Larger molecules diffuse faster than smaller molecules

Molecular size has no effect on diffusion rate

Smaller and larger molecules diffuse at the same rate

#10

Which of the following is an example of osmosis in biological systems?

Water moving out of a cell into the extracellular fluid

Water moving into a cell from the extracellular fluid

Movement of ions across a cell membrane

Active transport of molecules across a cell membrane

#11

What is the difference between osmosis and diffusion?

Osmosis involves the movement of solutes, while diffusion involves the movement of solvents.

Osmosis involves the movement of solvents, while diffusion involves the movement of solutes.

Osmosis requires a semipermeable membrane, while diffusion does not.

Diffusion requires a semipermeable membrane, while osmosis does not.

#12

What is reverse osmosis?

A process where solvents move from low to high concentration

A process where solutes move from high to low concentration

A process where water moves against its concentration gradient using energy

A process where water is forced through a semipermeable membrane from high to low concentration

#13

How does temperature affect the rate of diffusion?

Higher temperatures decrease the rate of diffusion

Higher temperatures increase the rate of diffusion

Temperature has no effect on diffusion rate

Higher temperatures only affect facilitated diffusion

#14

Which of the following is an example of osmosis in plants?

Water moving out of the root cells into the soil

Water moving into the root cells from the soil

Movement of nutrients across a leaf membrane

Active transport of ions in the stem

#15

What is the term for the pressure required to prevent the flow of water across a semipermeable membrane?

Osmotic pressure

Hydrostatic pressure

Diffusion pressure

Turgor pressure