Vocabulary

Nucleus: center of an atom

Mixture in which one or more substance are distributed evenly in another substance.

All of the chemical reactions that occur within an organism.

Bond formed between amino acids

Water: The universal solvent

Molecule with unequal distribution of charge

Large molecule formed when many smaller molecules bond together.

Net movement of particles from an area of high

Concentration to an area of lower concentration.

Minimum amount of energy required for reactants to form products

Substance that lowers energy needed to start a chemical reaction

Protein that is a biological catalyst

Molecule that binds to an enzyme

Fill in the Blank

• Atoms of the same element with different numbers of neutrons are…
• Atoms of two or more elements chemically combined are…
• Two atoms that share electrons are held together by __________ bonds.
• Any substance that forms hydrogen ions in water is an...