Multiple Choice
In a biochemical reaction, what effect would the presence of an enzyme have on the time required to produce 1 mg of product?
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6. Enzymes and Enzyme Kinetics
Enzymes
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How does an enzyme speed up a chemical reaction?
A
By increasing the temperature of the reaction environment
B
By lowering the activation energy required for the reaction to proceed
C
By changing the equilibrium constant of the reaction
D
By providing additional reactants to the reaction
Verified step by step guidance1
Understand the role of enzymes in biochemical reactions: Enzymes are biological catalysts that speed up chemical reactions without being consumed in the process.
Learn about activation energy: Activation energy is the minimum energy required for reactants to transform into products. Enzymes lower this energy barrier, making it easier for the reaction to proceed.
Recognize that enzymes do not change the equilibrium constant: Enzymes accelerate the rate at which equilibrium is reached but do not alter the equilibrium constant or the final concentrations of reactants and products.
Understand that enzymes do not increase temperature or provide additional reactants: Enzymes work by stabilizing the transition state and providing an alternative reaction pathway with lower activation energy, not by altering external conditions or adding reactants.
Conclude that enzymes speed up reactions by lowering the activation energy required for the reaction to proceed, which is the correct mechanism described in the problem.
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