A substance that cannot be separated or broken down into simpler substances by chemical means.
What is an element.
100
an attraction between a slightly positive hydrogen atom and a slighty negative atom, often oxygen or nitrogen.
What is a hydrogen bond?
100
a compound of a class of simple organic compounds that contain a carboxyl group and an amino group and that combine to form proteins
What is an amino acid?
100
change substances into different substances by b reaking and forming chemical bonds
What are chemical reactions?
100
a substance that decreases the activation energy needed to start a chemical reaction and, as a result, also increases the rate of the chemical reaction.
What is a catalyst?
200
A bond formed when atoms share one or more pairs of electrons.
What is covalent?
200
in a solution, the substance in which the solute dissolves
What is solvent?
200
a class of molecules that includes sugars, starches, and fiber; contains carbon, hydrogen, and oxygen
What is a carbohydrate?
200
the amount of energy that will break a bond between two atoms.
What is bond energy?
200
the specific reactants that an enzyme acts on.
What is are substrates?
300
a group of atoms that are held together by chemical forces.
What is a molecule?
300
any compound that increases the number of hydronium ions when dissolved in water
What is an acid?
300
a large molecule that is formed by more than five monomers, or small units
What is a polymer?
300
the amount of energy that needs to be absorbed for a chemical reaction to start.
What is activation energy?
300
catalysts for chemical reactions in living things.
What are enzymes?
400
A substance made up of atoms of two or more different elements joined by chemical bonds
What is a compound?
400
the attractive force between two bodies of different substances that are in contact with each other
What is adhesion?
400
a fat molecule or a molecule that has similar properties; examples include oils, waxes, and steroids
What is a lipid?
400
this type of chemical reaction absorbs more energy than it releases.
What is endothermic?
400
DAILY DOUBLE!
This model helps explain how enzymes work.
What is the lock-and-key?
500
the attractive force between oppositely charged ions.
What is an ionic bond?
500
the force that holds molecules of a single material together
What is cohesion?
500
an organic compound that is made of one or more chains of amino acids and that is a principal component of all cells
What is a protein?
500
the substances changed during a chemical reaction.
What is a reactant?
500
substrates temporarily bind to enzymes at these specific places.