Enzyme Catalysis in Biochemical Reactions

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What is the role of enzymes in biochemical reactions?

Have no impact on activation energy

Transform products into substrates

Increase the activation energy

Decrease the activation energy (correct)

What is the function of the catalytic site in an enzyme's structure?

Bind the product molecule

Increase the activation energy

Have no specific function

Bind the reactant molecule (correct)

What is the purpose of a cofactor in enzyme catalysis?

Increase enzyme concentration

Bind with the substrate molecule

Provide structural support to enzymes

Enhance enzyme activity (correct)

What is the role of the enzyme-substrate complex in an enzymatic reaction?

Facilitate reaction by stabilizing transition state Signup and view all the answers

How does enzyme concentration compare to total substrate concentration in catalysis?

Enzyme concentration is greater Signup and view all the answers

What does the Michaelis constant (Km) represent in enzyme kinetics?

Enzyme-substrate binding affinity Signup and view all the answers

What is the purpose of a catalyst in a chemical reaction?

To decrease the activation energy of the reaction Signup and view all the answers

What characterizes inhibitors in the context of catalysis?

They decrease the activation energy Signup and view all the answers

How do positive catalysts influence the number of effective collisions between reactants?

By decreasing the activation energy Signup and view all the answers

What is the main effect of a catalyst on a chemical reaction?

Decreasing the time needed for the reaction to proceed Signup and view all the answers

In enzyme catalysis, what is the function of an enzyme-substrate complex?

Catalyze formation of products Signup and view all the answers

Why do catalysts not change the yield of a reaction?

They provide an alternative pathway with lower activation energy Signup and view all the answers

What term describes the step by step pathway by which a reaction occurs?

Reaction mechanism Signup and view all the answers

Which term refers to the number of species that must collide to produce the reaction indicated by an elementary step?

Molecularity Signup and view all the answers

In enzyme catalysis, what term describes the species that appear in the mechanism of the reaction but not in the overall balanced equation?

Intermediates Signup and view all the answers

Enzyme Catalysis in Biochemical Reactions

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Questions and Answers

What is the role of enzymes in biochemical reactions?

What is the function of the catalytic site in an enzyme's structure?

What is the purpose of a cofactor in enzyme catalysis?

What is the role of the enzyme-substrate complex in an enzymatic reaction?

How does enzyme concentration compare to total substrate concentration in catalysis?

What does the Michaelis constant (Km) represent in enzyme kinetics?

What is the purpose of a catalyst in a chemical reaction?

What characterizes inhibitors in the context of catalysis?

How do positive catalysts influence the number of effective collisions between reactants?

What is the main effect of a catalyst on a chemical reaction?

In enzyme catalysis, what is the function of an enzyme-substrate complex?

Why do catalysts not change the yield of a reaction?

What term describes the step by step pathway by which a reaction occurs?

Which term refers to the number of species that must collide to produce the reaction indicated by an elementary step?

In enzyme catalysis, what term describes the species that appear in the mechanism of the reaction but not in the overall balanced equation?

What is the term for a series of simple reactions that represent the progress of an overall reaction at the molecular level?

In most mechanisms, which step is typically slower than the others?

What controls the overall rate of a reaction in terms of its kinetics?

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