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Enzymes

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Questions and Answers

What is the function of enzymes?

They change their structure during chemical reactions

They slow down chemical reactions to conserve energy

They speed up chemical reactions without being changed themselves (correct)

They only work on a single type of substrate

What is a characteristic of enzymes' structure?

They lack a defined mechanism

They have a defined amino acid sequence (correct)

They have a constantly changing three-dimensional structure

They are typically 1000-5000 amino acids long

How much faster can enzymes typically increase the speed of a reaction?

Equal speed as the uncatalyzed reaction

Depends on the size of the enzyme

106-10^14 times faster (correct)

2-5 times faster

What does it mean for enzymes to be stereospecific?

The reaction produces a single product Signup and view all the answers

Are enzymes reusable?

Yes, once an enzyme binds to a substrate and catalyzes the reaction, it is released unchanged Signup and view all the answers

What is an enzyme a substance that speeds up a chemical reaction and is changed by the reaction?

False Signup and view all the answers

Enzymes have a defined threedimensional structure.

True Signup and view all the answers

Enzymes increase the speed of a reaction typically by 10^6-10^14 times faster than the rate of the uncatalyzed reaction.

True Signup and view all the answers

Enzymes are always specific to a single substrate.

False Signup and view all the answers

Once an enzyme binds to a substrate and catalyzes the reaction, the enzyme is changed and cannot be used for another reaction.

False Signup and view all the answers

Enzymes

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Podcast

Questions and Answers

What is the function of enzymes?

What is a characteristic of enzymes' structure?

How much faster can enzymes typically increase the speed of a reaction?

What does it mean for enzymes to be stereospecific?

Are enzymes reusable?

What is an enzyme a substance that speeds up a chemical reaction and is changed by the reaction?

Enzymes have a defined threedimensional structure.

Enzymes increase the speed of a reaction typically by 10^6-10^14 times faster than the rate of the uncatalyzed reaction.

Enzymes are always specific to a single substrate.

Once an enzyme binds to a substrate and catalyzes the reaction, the enzyme is changed and cannot be used for another reaction.

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