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Questions and Answers
What is the function of enzymes?
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?
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?
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?
What does it mean for enzymes to be stereospecific?
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Are enzymes reusable?
Are enzymes reusable?
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What is an enzyme a substance that speeds up a chemical reaction and is changed by the reaction?
What is an enzyme a substance that speeds up a chemical reaction and is changed by the reaction?
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Enzymes have a defined threedimensional structure.
Enzymes have a defined threedimensional structure.
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Enzymes increase the speed of a reaction typically by 10^6-10^14 times faster than the rate of the uncatalyzed reaction.
Enzymes increase the speed of a reaction typically by 10^6-10^14 times faster than the rate of the uncatalyzed reaction.
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Enzymes are always specific to a single substrate.
Enzymes are always specific to a single substrate.
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Once an enzyme binds to a substrate and catalyzes the reaction, the enzyme is changed and cannot be used for another reaction.
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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