Which of the following are not polymeric?

Options

A. Proteins
B. Polysaccharides
C. Lipids
D. Nucleic Acids

Answer

To determine which of the following biomolecules are not polymeric, we need to analyze each option provided: proteins, polysaccharides, lipids, and nucleic acids.

### Step-by-Step Solution:

1. **Understanding Polymers**:
- Polymers are large molecules made up of repeating structural units called monomers. These can be either the same type (homopolymers) or different types (heteropolymers).

2. **Analyzing Proteins**:
- Proteins are polymers composed of amino acids linked together by peptide bonds. Since they are made up of repeating units (amino acids), proteins are considered polymeric.

3. **Analyzing Polysaccharides**:
- Polysaccharides are polymers formed from monosaccharides (like glucose and fructose) that are linked together by glycosidic bonds. Therefore, polysaccharides are also polymeric.

4. **Analyzing Nucleic Acids**:
- Nucleic acids (DNA and RNA) are polymers made up of nucleotide monomers (adenine, guanine, cytosine, thymine, and uracil). The nucleotides are linked by phosphodiester bonds, making nucleic acids polymeric as well.

5. **Analyzing Lipids**:
- Lipids, such as fats and oils, are primarily composed of fatty acids and glycerol. Unlike the other biomolecules, lipids do not form long chains or repeating units. Instead, they typically exist as globules or droplets. Therefore, lipids are not considered polymeric.

### Conclusion:
The biomolecule that is not polymeric among the given options is **lipids**.

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