Chemistry in Biology
Vocabulary Quiz #1
Directions: Find the word that corresponds with the correct definition. Mark the letter on your scantron.
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A substance that can’t be broken down into simpler chemical substances. A pure substance.
The smallest particle of an element that has the characteristics of that element.
The center of an atom
Positively charged particles in the atom
Particles that have no charge
Negatively charged particles
Atoms of the same element that have different numbers of neutrons
A substance that is composed of atoms of two or more different elements that are chemically
combined.
The force that holds together two atoms that share electrons
A group of atoms held together by covalent bonds
A charged particle made of atoms
The attractive force between two ions of opposite charge
When molecules come close together, the attractive force between these positive and negative
regions pull on the molecules and hold them together.
The specific location where a substrate binds on an enzyme
The process by which atoms or groups of atoms in substances are reorganized into different
substances.
The starting substances
The minimum amount of energy needed for reactants to form products in a chemical reaction
The substances formed during the reaction
A substance that lowers the activation energy needed to start a chemical reaction
The reactants that bind to the enzyme
Special proteins that are the biological catalysts that speed up the rate of chemical reactions in
biological processes
A. Atom
B. nucleus
C. proton
D. neutron
E. electron
A. element
B. isotope
C. compound
D. covalent bond
E. molecule
A. Ion
A. ionic bond
B. Van der Waals force
C. chemical reaction
D. Reactant
E. activation energy
A. product
B. catalyst
C. enzyme
D. Activation site
E. substrate