Enzymes Are Biological Catalysts That Enhance the Rate of a Reaction

question 76

Multiple Choice

Enzymes are biological catalysts that enhance the rate of a reaction by:

• A) decreasing the activation energy.
• B) decreasing the amount of free energy released.
• C) increasing the activation energy.
• D) increasing the amount of free energy released.
• E) increasing the energy of the transition state.

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Definitions:

Top Dead Center

The highest point a piston reaches in the cylinder of an engine during its compression stroke.

Overhead Camshaft Engines

Engines where the camshaft is located above the cylinder heads, directly operating the valves, which allows for more precise valve timing.

Camshaft

A crankshaft-driven shaft containing oblong-shaped lobes that push on valve lifters to open cylinder head valves.

Cylinder Head

The component of an engine that closes in the top of the cylinder, forming the combustion chamber and containing mechanisms such as valves and spark plugs.