Select the incorrect statement with respect to enzyme action .

Options

A. The substrate binds to the active site enzyme
B. The binding of the substrate induces the enzyme to alter its shape
C. Allosteric site breaks the chemical bonds of substrate.
D. Enzyme product complex is formed at active site

Answer

To solve the question, we need to evaluate each statement regarding enzyme action and identify the incorrect one. Here’s a step-by-step breakdown:

### Step 1: Analyze the First Statement
**Statement:** "The substrate binds to the active site of the enzyme."
- **Evaluation:** This statement is correct. Enzymes have specific regions called active sites where substrates bind to form an enzyme-substrate complex.

**Hint:** Remember that the active site is where the substrate fits, similar to a key fitting into a lock.

### Step 2: Analyze the Second Statement
**Statement:** "The binding of the substrate induces the enzyme to alter its shape."
- **Evaluation:** This statement is also correct. The binding of the substrate can induce a conformational change in the enzyme, enhancing its activity (known as the induced fit model).

**Hint:** Think of how a glove fits around a hand; the glove changes shape to fit the hand better when it is worn.

### Step 3: Analyze the Third Statement
**Statement:** "The allosteric site breaks the chemical bonds of substrate."
- **Evaluation:** This statement is incorrect. The allosteric site does not break chemical bonds of the substrate. Instead, it is involved in the regulation of enzyme activity by binding activators or inhibitors, which can affect the enzyme's ability to bind the substrate at the active site.

**Hint:** Recall that the allosteric site is for regulation, not for catalyzing reactions or breaking bonds.

### Step 4: Analyze the Fourth Statement
**Statement:** "Enzyme product complex is formed at the active site."
- **Evaluation:** This statement is correct. After the substrate binds and the reaction occurs, the enzyme-product complex is formed at the active site before the product is released.

**Hint:** Visualize the process: substrate binds, reaction occurs, and then the product is released from the active site.

### Conclusion
Based on the evaluations:
- The first statement is correct.
- The second statement is correct.
- The third statement is incorrect (this is the answer we are looking for).
- The fourth statement is correct.

Thus, the incorrect statement with respect to enzyme action is the third statement: "The allosteric site breaks the chemical bonds of substrate."

### Final Answer
The incorrect statement is: "The allosteric site breaks the chemical bonds of substrate."