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Enzymes: Specificity and Function

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Questions and Answers

What is the role of enzymes in a reaction?

Increase the temperature of the reaction

Change the pH of the reaction

Slow down the reaction

Accelerate the rate of the reaction (correct)

How is the specificity of enzymes determined?

By the structure of the protein (correct)

By the size of the enzyme

By the color of the substrate

By the temperature of the reaction

Which type of enzyme cleaves molecules by adding water?

Oxidoreductases

Transferases

Lyases

Hydrolases (correct)

What is the main function of isomerases?

Move functional groups within a molecule Signup and view all the answers

Which type of cofactor often must be present for an enzyme to catalyze a reaction?

Small organic molecules derived from vitamins (Coenzymes) Signup and view all the answers

What is the role of coenzymes that bind loosely to an enzyme?

Are like cosubstrates, being bound and released from the enzyme Signup and view all the answers

Which property determines if a reaction will occur spontaneously?

Free energy difference (ΔG) between products and reactants Signup and view all the answers

What does a negative ΔG indicate about a reaction?

Reaction will occur spontaneously Signup and view all the answers

What is the role of enzymes in altering the reaction rate?

Lowering the activation energy Signup and view all the answers

What is the first step in enzymatic catalysis?

Formation of enzyme-substrate complex Signup and view all the answers