2024-2025 Unit 3: Frequently Missed Retake Scenarios

Front

What is diffusion?

Back

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance between two areas.

Front

What does it mean for a process to require energy?

Back

A process that requires energy means that it is moving substances against their concentration gradient, typically from low to high concentration.

Front

What is spontaneous generation?

Back

Spontaneous generation is the discredited theory that living organisms can arise from non-living matter.

Front

What experiment disproved spontaneous generation?

Back

The experiment by Louis Pasteur, which showed that microorganisms come from other microorganisms, disproved spontaneous generation.

Front

What is a transport protein?

Back

A transport protein is a protein that helps move large molecules across the cell membrane.

Front

What is the phospholipid bilayer?

Back

The phospholipid bilayer is a double layer of phospholipids that makes up the cell membrane, providing a barrier to most water-soluble substances.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane using energy, typically against their concentration gradient.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, typically along the concentration gradient.