Which of the following statement is incorrect?

Options

A. For every hormone there is a gene.
B. For every protein there is a gene.
C. For production of every enzyme there is a gene.
D. For every molecule of fat there is a gene.

Explanation

To determine which statement is incorrect among the given options, we can analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze Option A**: "For every hormone, there is a gene."
- Hormones are proteins, and the synthesis of proteins is regulated by genes. Therefore, this statement is **correct**.

2. **Analyze Option B**: "There is a gene for every protein."
- Similar to hormones, all proteins are synthesized based on the information encoded in genes. Thus, this statement is also **correct**.

3. **Analyze Option C**: "There is a gene for the production of every enzyme."
- Enzymes are a type of protein, and like other proteins, their production is controlled by specific genes. Hence, this statement is **correct**.

4. **Analyze Option D**: "For every molecule of fat, there is a gene."
- Fat molecules (lipids) are not proteins and do not have specific genes that code for them. Instead, the synthesis of fatty acids and lipids is a more complex process that does not involve a single gene for each fat molecule. Therefore, this statement is **incorrect**.

### Conclusion:
The incorrect statement is **Option D**: "For every molecule of fat, there is a gene."

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