Which of the following statements about enzymes is wrong?

Options

A. Enzymes require optimum pH and temperature for maximum activity
B. Enzymes are denatured at high temperatures
C. Enzymes are mostly proteins but some are lipids also
D. Enzymes are highly specific

Answer

To determine which statement about enzymes is wrong, we will analyze each statement provided in the question.

### Step 1: Analyze the first statement
**Statement:** Enzymes require optimum pH and temperature.
**Analysis:** This statement is true. Enzymes do have an optimum pH and temperature at which they function best. For many human enzymes, the optimum pH is around 6.8 to 7.2, and the optimum temperature is typically around 37 degrees Celsius.

**Hint:** Remember that enzymes are sensitive to environmental conditions like pH and temperature.

### Step 2: Analyze the second statement
**Statement:** Enzymes are denatured at high temperature.
**Analysis:** This statement is also true. High temperatures can cause enzymes to denature, meaning their structure is altered, and they can no longer function properly. The active site of the enzyme can be disrupted, preventing substrate binding.

**Hint:** Consider how temperature affects the structure and function of proteins.

### Step 3: Analyze the third statement
**Statement:** Enzymes are mostly protein but some are lipids also.
**Analysis:** This statement is false. Enzymes are primarily proteins. While there are some RNA molecules that can act as enzymes (ribozymes), true enzymes are not lipids. Therefore, this statement is incorrect.

**Hint:** Recall the classification of biomolecules and the nature of enzymes.

### Step 4: Analyze the fourth statement
**Statement:** Enzymes are highly specific.
**Analysis:** This statement is true. Enzymes are known for their specificity; they catalyze specific reactions for specific substrates. Each enzyme is tailored to fit a particular substrate, much like a key fits a specific lock.

**Hint:** Think about the lock-and-key model of enzyme action.

### Conclusion
After analyzing all four statements, we find that the third statement is the only incorrect one. Therefore, the answer to the question is that the wrong statement about enzymes is:

**Answer:** Enzymes are mostly protein but some are lipids also.