Which phrase best describes an exothermic chemical reaction?

• Does not absorb any energy.
• Forms products with higher bond energy than reactants.
• Is in a state of equilibrium.
• Releases more energy than it absorbs.

Identify the products in this reaction: 6H2O + 6CO2 --> C6H12O6 + 6O2

• 6H2O and 6CO2
• 6CO2 and C6H12O6
• 6H2O, C6H12O6, and 6O2
• C6H12O6 and 6O2

Chemical reactions that absorb more energy than they release are considered to be .

• exothermic
• catalyzed
• endothermic
• anabolic

The activation energy needed for a chemical reaction is decreased by the presence of a .

• catalyst
• reactant
• product
• susbstrate

If the activation energy of a biochemical reaction is lowered, then

• the reaction will happen faster.
• the reaction will happen more slowly.
• more energy will need to be absorbed.
• the rate of the reaction will be unaffected.

The molecule that an enzyme binds to is known as its .

• substrate
• monomer
• polymer
• complimentary base

Reactants bind to enzymes at the .

• substrate
• product
• activation energy
• active site

In the graph to the right, an increase in temperature results in

• a decrease in the required activation energy.
• an increase in reaction rate.
• a decrease in the rate of reaction.
• an increase in both the reaction rate and activation energy.

Which macromolecule found in the food you eat will your cells break down first to get ATP?

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Which phrase best describes the function of the ATP molecule?

• absorbs energy
• increases energy
• stores energy
• creates energy