4. What are the six classes of enzyme?

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**Enzyme Biology: Key Concepts and Questions**

1. **What are the six classes of enzyme?**

2. **Explain a competitive inhibitor.**

3. **Induced-Fit Model Question:**
   - In the induced-fit model, what happens to the shape of the enzyme when the substrate binds?
     - A. stays the same
     - B. adapts to the shape of the substrate

4. **Types of Enzymes:**
   - 3) An enzyme that converts a functional group to another between two structures is:
     - A) oxidoreductase
     - B) transferase
     - C) hydrolase
     - D) lyase
     - E) isomerase

5. **Functions of Enzymes:**
   - What is the function of these enzymes?
     - **Oxidoreductase**
     - **Transferase**
     - **Decarboxylase**

6. **Feedback Mechanisms:**
   - 32) When an end product from an enzyme-mediated sequence is also an inhibitor for an earlier step in the reaction sequence, the process is referred to as:
     - A) feedback control.
     - B) competitive inhibition.
     - C) irreversible inhibition.
     - D) negative catalysis.
     - E) concentration control.

7. **Irreversible Inhibition:**
   - 35) An irreversible inhibitor is one that:
     - A) forms hydrogen bonds with the substrate.
     - B) binds to the enzyme with hydrophobic interactions.
     - C) reacts covalently with the substrate.
     - D) binds covalently to the enzyme active site.
     - E) reacts covalently with a cofactor.

8. **Role of Metal Ions:**
   - 47) Metal ions such as Zn²⁺ and Fe³⁺ are often needed by enzymes as:
     - A) isozymes.
     - B) allosteres.
     - C) inhibitors.
     - D) cofactors.
     - E) substrates.
Transcribed Image Text:**Enzyme Biology: Key Concepts and Questions** 1. **What are the six classes of enzyme?** 2. **Explain a competitive inhibitor.** 3. **Induced-Fit Model Question:** - In the induced-fit model, what happens to the shape of the enzyme when the substrate binds? - A. stays the same - B. adapts to the shape of the substrate 4. **Types of Enzymes:** - 3) An enzyme that converts a functional group to another between two structures is: - A) oxidoreductase - B) transferase - C) hydrolase - D) lyase - E) isomerase 5. **Functions of Enzymes:** - What is the function of these enzymes? - **Oxidoreductase** - **Transferase** - **Decarboxylase** 6. **Feedback Mechanisms:** - 32) When an end product from an enzyme-mediated sequence is also an inhibitor for an earlier step in the reaction sequence, the process is referred to as: - A) feedback control. - B) competitive inhibition. - C) irreversible inhibition. - D) negative catalysis. - E) concentration control. 7. **Irreversible Inhibition:** - 35) An irreversible inhibitor is one that: - A) forms hydrogen bonds with the substrate. - B) binds to the enzyme with hydrophobic interactions. - C) reacts covalently with the substrate. - D) binds covalently to the enzyme active site. - E) reacts covalently with a cofactor. 8. **Role of Metal Ions:** - 47) Metal ions such as Zn²⁺ and Fe³⁺ are often needed by enzymes as: - A) isozymes. - B) allosteres. - C) inhibitors. - D) cofactors. - E) substrates.
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