Biomolecules occur in the cellular pool as

Options

A. Solutes in true solution
B. Colloids in colloidal solution
C. Insoluble in cellular structure
D. All the above.

Answer

**Step-by-Step Solution:**

1. **Understanding Biomolecules**: Biomolecules are organic molecules that are essential for life. They include carbohydrates, proteins, lipids, and nucleic acids. These biomolecules are present in cells and play various roles in biological processes.

2. **Defining Cellular Pool**: The cellular pool refers to the collection of biomolecules within a cell. This pool consists of both organic and inorganic molecules that are vital for cellular function.

3. **Phases of Cellular Pool**: The cellular pool exists in two phases:
- **Aqueous Phase**: This phase contains solutes that can be categorized into:
- **True Solutions (Crystalloids)**: These are solutes that are completely dissolved in the solvent, forming a true solution.
- **Colloidal Solutions**: These contain larger particles that do not settle out and remain dispersed in the solvent.
- **Non-Aqueous Phase**: This phase includes insoluble molecules that are part of cellular structures, such as:
- **Cell Membrane**: Composed of lipids and proteins.
- **Cell Wall**: Found in plant cells, composed mainly of cellulose.

4. **Conclusion**: Given that biomolecules can exist in the cellular pool as solutes in true solutions (crystalloids), colloids in colloidal solutions, and as insoluble components in cellular structures, the correct answer to the question is "all the above."

**Final Answer**: Biomolecules occur in the cellular pool as all the above options: solutes in true solution, colloids in colloidal solution, and insoluble in cellular structures.

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