Multiple Choice
Which enzyme is responsible for connecting complementary nucleotides to a growing DNA strand during DNA replication?
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7. Energy and Metabolism
Enzymes
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Which part of the reaction energy diagram represents the effect of an enzyme on the activation energy of a chemical reaction?
A
The final energy level of the products
B
The lower peak showing reduced activation energy with enzyme
C
The initial energy level of the reactants
D
The area under the curve between reactants and products
Verified step by step guidance1
Understand the concept of activation energy: Activation energy is the minimum energy required for reactants to transform into products during a chemical reaction. Enzymes lower this energy barrier, making the reaction proceed faster.
Examine the reaction energy diagram: A typical energy diagram shows the energy levels of reactants, the peak representing the activation energy, and the energy level of products.
Identify the effect of the enzyme: Enzymes reduce the height of the peak in the energy diagram, which corresponds to the activation energy. This lower peak indicates the reduced energy barrier due to the enzyme's catalytic action.
Compare the energy levels: The initial energy level of reactants and the final energy level of products remain unchanged by the enzyme. The enzyme specifically affects the activation energy, not the overall energy change of the reaction.
Locate the relevant part of the diagram: The lower peak in the energy diagram, which represents the reduced activation energy, is the part that shows the effect of the enzyme on the chemical reaction.
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