Keystone Review - Module 1

Front

What do the terms base and alkaline refer to in solutions?

Back

Solutions that contain more hydroxide ions than hydrogen ions.

Front

What is the role of DNA in organisms?

Back

DNA contains information for growth and development.

Front

What would happen to chemical reactions in the body without enzymes?

Back

They would occur too slowly to support life processes.

Front

What is a hypothesis?

Back

A testable possible explanation of an observation.

Front

What is the main difference between ionic bonds and covalent bonds?

Back

Electrons are exchanged between atoms held together by an ionic bond, but they are shared between atoms held together by a covalent bond.

Front

What is a base in terms of pH?

Back

A substance that increases the concentration of hydroxide ions in a solution.

Front

What is the function of enzymes in biological reactions?

Back

Enzymes speed up chemical reactions by lowering the activation energy.

Front

What is the structure of DNA?

Back

DNA is a double helix made up of nucleotides.

Front

What is the significance of hydronium ions in solutions?

Back

Hydronium ions indicate the acidity of a solution.

Front

What is the difference between a hypothesis and a theory?

Back

A hypothesis is a testable prediction, while a theory is a well-substantiated explanation.