Which of the following are not polymeric

Options

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

Answer

To determine which of the following options are not polymeric, we need to understand what a polymer is. A polymer is a large molecule made up of repeating structural units called monomers, which are connected by covalent chemical bonds.

### Step-by-Step Solution:

1. **Understanding Polymers**:
- Polymers are formed from monomeric units through a process called polymerization.
- Examples of polymers include nucleic acids, proteins, and polysaccharides.

2. **Analyzing Each Option**:
- **Option 1: Nucleic Acids**:
- Nucleic acids (DNA and RNA) are polymers made of nucleotide monomers linked by phosphodiester bonds.
- Therefore, nucleic acids are polymeric.

- **Option 2: Proteins**:
- Proteins are polymers made of amino acids linked by peptide bonds.
- Thus, proteins are also polymeric.

- **Option 3: Polysaccharides**:
- Polysaccharides are polymers formed from monosaccharide units linked together.
- Hence, polysaccharides are polymeric as well.

- **Option 4: Lipids**:
- Lipids, such as fats, are primarily composed of fatty acids and glycerol.
- They do not form long chains of repeating monomeric units like the other three options.
- Therefore, lipids are not considered polymers.

3. **Conclusion**:
- Among the options provided, lipids are the only ones that are not polymeric.

### Final Answer:
- **Lipids** are not polymeric.