Which is not a macromolecules?

Options

A. `DNA`
B. Insulin
C. Palmitate
D. Starch

Answer

To determine which of the given options is not a macromolecule, we need to analyze each option based on the definition of macromolecules.

### Step-by-Step Solution:

1. **Understanding Macromolecules**:
- Macromolecules are large molecules composed of smaller subunits called monomers. Common examples include proteins, nucleic acids, and polysaccharides.

2. **Analyzing the Options**:
- **Option A: DNA**
- DNA (deoxyribonucleic acid) is a polymer made up of nucleotide monomers. It is a large and complex molecule, thus it is classified as a macromolecule.

- **Option B: Insulin**
- Insulin is a protein hormone composed of 51 amino acids. Proteins are also considered macromolecules because they are made up of long chains of amino acids (monomers). Therefore, insulin is a macromolecule.

- **Option C: Palmitate**
- Palmitate is a long-chain fatty acid. While it is a larger molecule compared to simple molecules, it does not fit the criteria of a macromolecule as it is not composed of repeating monomeric units like the others. It is considered a smaller molecule compared to the others listed.

- **Option D: Starch**
- Starch is a polysaccharide made up of many glucose units linked together by glycosidic bonds. Since it consists of multiple repeating units, starch is classified as a macromolecule.

3. **Conclusion**:
- Among the options provided, **palmitate** is the only one that is not classified as a macromolecule. Therefore, the correct answer is **Option C: Palmitate**.

### Final Answer:
**The molecule that is not a macromolecule is Palmitate (Option C).**