Biochemistry Unit Review (2025-26)

Front

What are the 6 most common elements in living things?

Back

Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur.

Front

What is a polypeptide chain?

Back

A polypeptide chain is a polymer of amino acids that forms proteins.

Front

What is the role of enzymes in biochemical reactions?

Back

Enzymes speed up chemical reactions by lowering the activation energy.

Front

What happens to water when it freezes?

Back

Water expands and becomes less dense when it freezes.

Front

What is capillary action?

Back

Capillary action is the ability of water to travel up a thin tube due to cohesion and adhesion.

Front

Define a macromolecule.

Back

A macromolecule is a large molecule composed of thousands of atoms, such as proteins, nucleic acids, carbohydrates, and lipids.

Front

What is the primary function of proteins in living organisms?

Back

Proteins serve various functions including catalyzing biochemical reactions, providing structure, and regulating processes.

Front

What is the difference between saturated and unsaturated fats?

Back

Saturated fats have no double bonds between carbon atoms, while unsaturated fats have one or more double bonds.

Front

What is the significance of the pH scale in biochemistry?

Back

The pH scale measures the acidity or basicity of a solution, which can affect enzyme activity and biochemical reactions.

Front

What are nucleic acids and their function?

Back

Nucleic acids, such as DNA and RNA, store and transmit genetic information.