24-25 Biology - S1 Final Exam

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

Osmosis is the movement 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 facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across a cell membrane via protein channels, without the use of energy.

Front

What is a dependent variable?

Back

A dependent variable is the variable that is measured in an experiment, which is affected by changes in the independent variable.

Front

What is an independent variable?

Back

An independent variable is the variable that is changed or controlled in an experiment to test its effects on the dependent variable.

Front

What are the components of a cell membrane?

Back

The cell membrane is primarily composed of phospholipids, proteins, and carbohydrates.

Front

What is the function of proteins in the cell membrane?

Back

Proteins in the cell membrane serve various functions, including acting as channels for transport, receptors for signaling, and structural support.

Front

What is the role of carbohydrates in the cell membrane?

Back

Carbohydrates in the cell membrane are involved in cell recognition and communication.

Front

What is the significance of concentration gradients in diffusion?

Back

Concentration gradients drive the movement of molecules during diffusion, as substances move from areas of higher concentration to areas of lower concentration.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.