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Questions and Answers
What is the primary function of an enzyme in digestion?
What is the primary function of an enzyme in digestion?
- To regulate the pH of the digestive system
- To synthesize new molecules from smaller ones
- To absorb nutrients into the bloodstream
- To break down large molecules into smaller ones (correct)
According to the lock and key hypothesis, what is the shape of an enzyme's active site?
According to the lock and key hypothesis, what is the shape of an enzyme's active site?
- Complementary to the substrate (correct)
- Identical to the substrate
- Random and variable
- Larger than the substrate
What is the advantage of an enzyme's specificity in digestion?
What is the advantage of an enzyme's specificity in digestion?
- It allows the enzyme to bind to multiple substrates
- It reduces the risk of unwanted reactions (correct)
- It requires more energy to catalyze the reaction
- It increases the rate of reaction
What is the role of the substrate in the lock and key hypothesis?
What is the role of the substrate in the lock and key hypothesis?
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How does an enzyme's shape contribute to its function in digestion?
How does an enzyme's shape contribute to its function in digestion?
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Study Notes
Enzyme Function in Digestion
- The lock and key hypothesis is a model used to describe the action of enzymes.
- Enzymes function in digestion by recognizing and binding to specific substrates, much like a key fitting into a lock.
- The unique shape of the enzyme's active site allows it to bind to specific substrates, facilitating a chemical reaction.
- The binding of the substrate to the enzyme's active site positions the substrate for a chemical reaction to occur.
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