Simple as well as facilitated diffusion both (correct one) –

Options

A. Do not require ATP energy
B. Show uphill transport
C. Require special membrane proteins
D. Can not transfer the substances having a hydrophobic moiety

Answer

### Step-by-Step Solution:

1. **Understanding Simple Diffusion**:
- Simple diffusion is the movement of particles from an area of high concentration to an area of low concentration, which is also known as downhill transport.
- It does not require any energy (ATP) as it occurs along the concentration gradient.

2. **Understanding Facilitated Diffusion**:
- Facilitated diffusion also involves the movement of particles along the concentration gradient (from high to low concentration).
- However, it requires special membrane proteins (carrier proteins) to assist in the transport of substances across the cell membrane.
- Like simple diffusion, facilitated diffusion does not require ATP energy.

3. **Analyzing the Options**:
- **Option 1: "Don't require ATP energy"**: This is correct for both simple and facilitated diffusion.
- **Option 2: "Show uphill transport"**: This is incorrect. Both types of diffusion are downhill processes.
- **Option 3: "Require special membrane proteins"**: This is incorrect for simple diffusion, as it does not require proteins; only facilitated diffusion requires them.
- **Option 4: "Can't transfer the substance having a hydrophobic moiety"**: This is incorrect because substances can be transported depending on the type of transport and the nature of the molecules.

4. **Conclusion**:
- The correct statement for both simple and facilitated diffusion is that they "don't require ATP energy".