Catalysts and Chemical Reactions

What type of molecules are most often involved in catalyzing chemical reactions?

• Lipids

• Carbohydrates

• Proteins

• Nucleic acids

How do catalysts lower the activation energy of a chemical reaction?

• By increasing the temperature

• By lowering the temperature

• By providing an alternative reaction pathway

• By increasing the concentration of reactants

Catalysts are specific because they only work on:

• Any molecule

• A molecule or set of closely related molecules

• All types of molecules

• Molecules with high energy

Which of the following is NOT one of the four mechanisms by which catalysts work?

• Acid-base

• Covalent

• Entropy reduction

• Temperature increase

Which of the following is a mechanism by which catalysts work?

• Pressure increase

• Metal ion

• Light absorption

• Sound waves

Which category of enzymes is responsible for oxidation-reduction reactions?

• Transferases

• Hydrolases

• Oxidoreductases

• Lyases

Which category of enzymes is involved in the transfer of functional groups?

• Isomerases

• Transferases

• Ligases

• Lyases

Which category of enzymes catalyzes the hydrolysis of bonds by adding a water molecule?

• Hydrolases

• Oxidoreductases

• Ligases

• Isomerases

Which category of enzymes is responsible for non-hydrolytic bond breaking?

• Lyases

• Transferases

• Isomerases

• Hydrolases

Which category of enzymes catalyzes the isomerization of molecules?

• Ligases

• Isomerases

• Oxidoreductases

• Hydrolases