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 will analyze each statement one by one.

### Step-by-Step Solution:

1. **Understanding the Statements**:
- We have four statements to evaluate:
1. For every hormone, there is a gene.
2. For every protein, there is a gene.
3. For the production of every enzyme, there is a gene.
4. For every molecule of fat, there is a gene.

2. **Analyzing Each Statement**:
- **Statement 1**: "For every hormone, there is a gene."
- This statement is generally true. Hormones are often proteins or peptides, and each protein is coded by a specific gene.

- **Statement 2**: "For every protein, there is a gene."
- This statement is also true. According to the central dogma of molecular biology, each protein is encoded by a gene.

- **Statement 3**: "For the production of every enzyme, there is a gene."
- This statement is true as well. Enzymes are proteins that catalyze biochemical reactions, and each enzyme is produced based on the information in a gene.

- **Statement 4**: "For every molecule of fat, there is a gene."
- This statement is incorrect. While fats (lipids) are important biological molecules, they are not directly coded by specific genes. Instead, genes code for proteins that may be involved in the synthesis or metabolism of fats, but not for the fats themselves.

3. **Identifying the Incorrect Statement**:
- After analyzing all four statements, we can conclude that the fourth statement, "For every molecule of fat, there is a gene," is incorrect.

### Final Answer:
The incorrect statement is: **"For every molecule of fat, there is a gene."**

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