Topic 1

Question 1

What is osmosis?

Answer 1

The movement of water molecules through a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration

Osmosis is a specific type of diffusion that involves water molecules.

Question 2

What is diffusion?

Answer 2

The process by which molecules spread from areas of high concentration to areas of low concentration

Diffusion can occur in gases, liquids, and solids.

Question 3

What is active transport?

Answer 3

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy

Active transport is crucial for maintaining cellular concentrations of ions and nutrients.

Question 4

Fill in the blank: _______ is the movement of water molecules through a semi-permeable membrane.

Answer 4

[Osmosis]

Question 5

True or False: Diffusion requires energy to occur.

Answer 5

False

Diffusion is a passive process and does not require energy.

Question 6

List three types of cell transport.

Answer 6

• Osmosis
• Diffusion
• Active transport

Question 7

What role does energy play in active transport?

Answer 7

Energy is required to move molecules against their concentration gradient

This energy often comes from ATP.

Question 8

Fill in the blank: _______ involves the movement of molecules from high to low concentration without energy input.

Answer 8

[Diffusion]

Question 9

What is the main difference between passive transport and active transport?

Answer 9

Passive transport does not require energy, while active transport does

Passive transport includes processes like osmosis and diffusion.

Question 10

Fill in the blank: In _______ transport, molecules move through protein pumps in the membrane against their concentration gradient.

Answer 10

[Active]