Physical property of cytosol is

Options

A. Tyndall's effect
B. Brownian movement
C. Irritability
D. (1) & (2)

Answer

To answer the question regarding the physical properties of cytosol, we need to analyze the options provided: Tyndall effect, Brownian movement, and irritability.

### Step-by-Step Solution:

1. **Understanding Cytosol**:
- Cytosol is the semi-fluid part of the cell that is surrounded by the plasma membrane. It contains various organelles and is primarily composed of water, salts, and organic molecules.

**Hint**: Remember that cytosol is part of the cytoplasm and is crucial for cellular processes.

2. **Analyzing Tyndall Effect**:
- The Tyndall effect refers to the scattering of light by particles in a colloidal solution. In the case of cytosol, it can be considered a colloidal solution due to the presence of various organelles and macromolecules.
- Since cytosol can scatter light, it exhibits the Tyndall effect.

**Hint**: Think about how light behaves when it passes through a mixture with small particles.

3. **Analyzing Brownian Movement**:
- Brownian movement is the random, uncontrolled movement of particles suspended in a fluid, caused by collisions with other molecules in the fluid.
- In cytosol, the particles (like organelles) are suspended and will exhibit Brownian movement due to constant collisions with surrounding molecules.

**Hint**: Consider how tiny particles behave in a fluid environment when they are constantly bumped by other molecules.

4. **Analyzing Irritability**:
- Irritability refers to the ability of a cell or organism to respond to stimuli. It is more related to the behavior of living organisms rather than a physical property of a solution.
- Cytosol itself does not exhibit irritability; rather, it is the cells that can respond to stimuli.

**Hint**: Distinguish between the physical properties of a solution and the biological responses of living cells.

5. **Conclusion**:
- Based on the analysis, the correct physical properties of cytosol are the Tyndall effect and Brownian movement. Therefore, the correct answer is that both options 1 (Tyndall effect) and 2 (Brownian movement) are exhibited by cytosol.

**Final Answer**: The physical properties of cytosol are Tyndall effect and Brownian movement (Options 1 and 2).