Chemistry of Life

What is the basic unit of matter made up of protons, neutrons, and electrons?

• Molecule

• Atom

• Compound

• Element

Which subatomic particle is negatively charged and in constant motion around the nucleus?

• Proton

• Neutron

• Electron

• Ion

What is a pure substance that consists entirely of one type of atom?

• Compound

• Molecule

• Element

• Ion

What type of bond is formed when one or more electrons are transferred from one atom to another?

• Covalent bond

• Ionic bond

• Hydrogen bond

• Adhesion

What is the attraction between molecules of the same substance called?

• Adhesion

• Cohesion

• Hydrogen bond

• Ionic bond

What are molecules made of carbon and other elements called?

• Inorganic molecules

• Organic molecules

• Polymers

• Monomers

What is a kind of macromolecule made of carbon, hydrogen, and oxygen atoms, usually in a 1:2:1 ratio?

• Lipid

• Protein

• Carbohydrate

• Nucleic acid

What are the 20 building blocks (monomers) of proteins called?

• Nucleotides

• Amino acids

• Polymers

• Lipids

What is the process that changes or transforms one set of compounds into another?

• Activation energy

• Chemical reaction

• Catalysis

• Enzyme activity

What are biological catalysts that speed up chemical reactions in cells called?

• Substrates

• Reactants

• Enzymes

• Products