Question

Which is not a macromolecule

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

Hint:

Proteins, nucleic acids, and polysaccharides are macromolecules. Fatty acids like palmitate are not polymers.

Answer 1

The Correct Option is C

Concept:
Macromolecules are very large molecules made up of many smaller units or having large molecular mass. Examples of biological macromolecules include: \[ \text{proteins} \] \[ \text{polysaccharides} \] \[ \text{nucleic acids} \]

Step 1: Check DNA.
DNA is a nucleic acid. It is a polymer of nucleotides. Therefore, DNA is a macromolecule.

Step 2: Check starch.
Starch is a polysaccharide. It is made up of many glucose units. Therefore, starch is a macromolecule.

Step 3: Check insulin.
Insulin is a protein hormone. Proteins are polymers of amino acids. Therefore, insulin is also a macromolecule.

Step 4: Check palmitate.
Palmitate is the ion or salt form of palmitic acid, a fatty acid. It is not a polymer and does not have very large molecular mass like DNA, starch, or proteins. Therefore, palmitate is not a macromolecule. Hence, the correct answer is: \[ \boxed{(C)\ \text{Palmitate}} \]