Which of the following is correct with respect to uphill transport using channel pumps?

Options

A. Lower concentration to higher concentration utilizing ATP
B. Higher concentration to lower concentration utilizing ATP
C. Higher concentration to lower concentration without utilizing ATP
D. Hypertonic solution to hypotonic solution

Answer

To solve the question regarding uphill transport using channel pumps, we need to understand the concepts of active and passive transport.

### Step-by-Step Solution:

1. **Understanding Transport Mechanisms**:
- There are two main types of transport mechanisms in biological systems: active transport and passive transport.
- Active transport is also known as uphill transport, while passive transport is known as downhill transport.

2. **Active Transport**:
- Active transport moves substances from an area of lower concentration to an area of higher concentration.
- This process requires energy, usually in the form of ATP (adenosine triphosphate).

3. **Passive Transport**:
- Passive transport moves substances from an area of higher concentration to an area of lower concentration.
- This process does not require energy (ATP).

4. **Analyzing the Options**:
- **Option 1**: Lower concentration to higher concentration utilizing ATP.
- This is correct as it describes active transport.
- **Option 2**: Higher concentration to lower concentration utilizing ATP.
- This is incorrect because this describes passive transport, which does not use ATP.
- **Option 3**: Higher concentration to lower concentration without utilizing ATP.
- This is also incorrect as it describes diffusion, a form of passive transport.
- **Option 4**: Hypertonic solution to hypotonic solution.
- This is incorrect because active transport goes from hypotonic (lower concentration) to hypertonic (higher concentration).

5. **Conclusion**:
- The correct option regarding uphill transport using channel pumps is **Option 1**: Lower concentration to higher concentration utilizing ATP.