Which of the following is correct about facilitated and Active transport?

Options

A. Both need energy
B. Both need no ATP.
C. Both use carbohydrates to move the molecules across the membrane
D. Both need carrier proteins which are sensitive to inhibitors that react with protein side chains

Answer

### Step-by-Step Text Solution:

1. **Understanding the Concepts**:
- **Facilitated Diffusion**: This is a type of passive transport where molecules move across the cell membrane through specific carrier proteins without the use of energy (ATP).
- **Active Transport**: This process requires energy (usually in the form of ATP) to move molecules against their concentration gradient, using specific carrier proteins.

2. **Analyzing the Options**:
- **Option 1**: "Both need energy."
- This is incorrect because only active transport requires energy.
- **Option 2**: "Both need no ATPs."
- This is also incorrect since active transport requires ATP.
- **Option 3**: "Both use carbohydrates to move the molecule across the membrane."
- This is incorrect as neither facilitated diffusion nor active transport specifically uses carbohydrates for transport.
- **Option 4**: "Both need carrier proteins."
- This is correct. Both facilitated diffusion and active transport utilize carrier proteins to transport molecules across the membrane.

3. **Conclusion**:
- The correct statement about facilitated diffusion and active transport is that both need carrier proteins.