An unknown liquid collected from a sample of peas, is added to a beaker of water and is vigorously shaken. After few minutes, water and the unknown liquid made two separate layers. To which class of biomolecules, does the unknown liquid most likely belongs ?

Options

A. polysaccharides
B. Proteins
C. lipids
D. Enzymes

Explanation

To determine the class of biomolecules to which the unknown liquid belongs, we can follow these steps:

### Step-by-Step Solution:

1. **Observation of the Experiment**: The unknown liquid collected from peas is mixed with water and after vigorous shaking, two separate layers are formed. This indicates that the two substances do not mix well.

2. **Understanding Solubility**: The formation of two layers suggests that the unknown liquid is not soluble in water. In biological terms, substances can be classified based on their solubility in water.

3. **Evaluating Possible Classes of Biomolecules**:
- **Polysaccharides**: These are carbohydrates that are generally soluble in water. If the unknown liquid were a polysaccharide, it would likely dissolve in water rather than forming a separate layer.
- **Proteins**: Most proteins are also soluble in water. If the unknown liquid were a protein, it would either dissolve or settle at the bottom, not float on top.
- **Lipids**: Lipids are known for their hydrophobic nature, meaning they do not dissolve in water. Instead, they tend to float on top of water, which aligns with the observation of two separate layers.
- **Enzymes**: Enzymes are typically proteins and thus would share the same solubility characteristics as proteins.

4. **Conclusion**: Since the unknown liquid does not mix with water and forms a separate layer, it is most likely a lipid. Therefore, the unknown liquid belongs to the class of biomolecules known as lipids.

### Final Answer:
The unknown liquid most likely belongs to the class of biomolecules known as **lipids**.

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