1 The following shows a graph of the energy changes taking place as a chemical reaction progresses. If an enzyme is added, which arrow’s magnitude will change? Will it increase or decrease? A. Arrow A will increase.
B. Arrow A will decrease.
C. Arrow B will decrease***
D. Arrow B will increase.
2 Name each subatomic particle, its charge, and its location in an atom.
A. proton, positive charge, nucleus; neutron, positive charge, nucleus; electron, no charge, space around nucleus
B. proton, positive charge, nucleus; neutron, no charge, nucleus; electron, negative charge, space around nucleus*
C. proton, no charge, nucleus; neutron, positive charge, nucleus; electron, negative charge, space around nucleus
D. proton, no charge, nucleus; neutron, negative charge, space around nucleus; electron, no charge, nucleus

3 Which of the following is true of an exergonic chemical reaction?
A. Reactants lose mass as products are formed.
B. Bonds are broken in reactants and new bonds are formed in products.
C. No activation energy is required to initiate it.*
D. The energy released is captured by a catalyst.