The correct Answer is:
A
To determine which statement is incorrect, we need to analyze each of the given statements regarding genes and their relationship with hormones, proteins, enzymes, and fat molecules.

1. Understanding the Relationship Between Genes and Proteins:
– Genes are segments of DNA that code for proteins. Each gene typically corresponds to a specific protein.

2. Analyzing the Statements:
– Statement 1: For every hormone, there is a gene.
– Hormones are often proteins (like insulin), so this statement is generally true.
– Statement 2: For every protein, there is a gene.
– This statement is also true, as proteins are synthesized based on the information encoded in genes.
– Statement 3: For the production of every enzyme, there is a gene.
– Enzymes are proteins that catalyze biochemical reactions, so this statement is true as well.
– Statement 4: For every molecule of fat, there is a gene.
– This statement is incorrect. Fat molecules (lipids) are not proteins and do not have specific genes coding for them in the same way that proteins do.

3. Conclusion:
– The incorrect statement is: “For every molecule of fat, there is a gene.”

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