Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

GACS lclab Biology - Chapter 6- Chemistry in Biology-Vocabulary


building block of matter; contains subatomic particles-nuetrons, electrons, and protons


center of an atom


positively charged particles


particles that have no charge


negatively charged particles


pure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means


atoms of the same element that have different numbers of neutrons


a pure substance that is formed when two or more different elements that are chemically combined

covalent bond

when two atoms share electrons, such as hydrogen sharing oxygen in water, the force that holds them together is called........

covalent bond

the chemical bond when electrons are shared


a compound in which the atoms are held together by covalent bonds


an atom that gains or loses electrons has an electrical charge and is called .......

ionic bond

a bond with an electrical attraction between two oppositely charged atoms or groups of atoms call ions

van der Waals forces

the attraction between molecules caused by positive and negative charges when they become close together

chemical reaction

process by which atom or groups of atoms are reorganized into different substances


substances that exists before a chemical reaction starts


substances formed by chemical reactions

activation energy

the minimum amount of energy needed for reactants to form products in a chemical reaction


a substance that lowers the activation energy level needed to start a chemical reaction


special proteins that speed up the rate of chemical reactions


reactants that bind enzymes

active site

the specific location where a substrate binds on an enzyme

polar molecule

molecules with an uneven distribution of charges

hydrogen bond

a weak interaction involving a hydrogen atom and a fluorine, oxygen, or nitrogen atom.


a combination of substances in which the individual components retain their own properties


a mixture in which one or more substances (solutes) are distributed evenly in another substance (solvent)


a substance in which anther substance is being dissolved


the substance that is dissolved in the solvent


substances that release hydrogen ions when dissolved


a substance that releases hydroxide (OH-) ions when dissolved


the measure of H+ concentration in a solution


mixtures that can react with acids or bases to keep the pH within a particular range


large molecules that are formed by joining smaller organic molecules together


molecules made from repeating units of identical compounds


compounds composed of carbon, hydrogen, and oxygen


molecules made mostly of carbon and hydrogen that make up the fats, oils, and waxes


a compound made of small carbon compounds that are called amino acids

amino acid

small compounds that are made of carbon, nitrogen, oxygen, hydrogen, and sometimes sulfer

nucleic acid

complex macromolecules that store and transmit genetic information


small repeating subunits that make up nucleic acid

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording