Biology Regents Review

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

Why do red blood cells often burst in distilled water?

Back

Red blood cells have only a cell membrane, which does not protect them from bursting when placed in a hypotonic solution like distilled water.

Front

What is an organic molecule?

Back

An organic molecule is a compound that contains carbon and is found in living organisms. Examples include sugars, proteins, and fats.

Front

What are the building blocks of proteins?

Back

The building blocks of proteins are amino acids.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain substances to pass through while blocking others, helping to regulate the internal environment of a cell.

Front

What happens to glucose molecules in a solution separated by a selectively permeable membrane?

Back

Over time, glucose molecules will move from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes are catalysts that speed up chemical reactions in the body by lowering the activation energy required for the reaction to occur.

Front

What is the difference between prokaryotic and eukaryotic cells?

Back

Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells have a nucleus and organelles.

Front

What is the function of the cell wall?

Back

The cell wall provides structural support and protection to the cell, and it helps maintain the shape of the cell.

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.