Biology Review

Front

What is a phospholipid bilayer?

Back

A phospholipid bilayer is a double layer of phospholipids that makes up the cell membrane, providing a barrier that separates the inside of the cell from the outside environment.

Front

Define osmosis.

Back

Osmosis is the diffusion of water through a selectively permeable membrane.

Front

What happens to a red blood cell in a hypertonic solution?

Back

In a hypertonic solution, water from the red blood cell will move into the solution, causing the cell to shrink.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf external substances, bringing them into the cell.

Front

What is the rough endoplasmic reticulum?

Back

The rough endoplasmic reticulum is an organelle studded with ribosomes, involved in protein synthesis and processing.

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 a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass while blocking others.

Front

What is the function of the Golgi body?

Back

The Golgi body modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.

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.

Front

What is the role of water in osmosis?

Back

Water moves through a selectively permeable membrane to balance solute concentrations on both sides.