Movement of a molecule across a membrane independent of other molecules is known as –

Options

A. Apoplast
B. Uniport
C. Antiport
D. Symport

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes the movement of a molecule across a membrane without the influence or dependence on other molecules.

2. **Analyzing the Options**:
- **Apoplast**: This term refers to the space between cells that allows for the passive diffusion of materials. It does not specifically describe the independent movement of a single molecule.
- **Uniport**: This term specifically refers to the transport of a single molecule across a membrane independently of other molecules. This is the option that fits the question.
- **Antipode**: This term describes the movement of two molecules in opposite directions, which does not apply to the question.
- **Symport**: This term refers to the simultaneous movement of two molecules in the same direction across a membrane, which again does not fit the question.

3. **Selecting the Correct Answer**: Based on the analysis, the correct term for the movement of a molecule across a membrane independent of other molecules is **uniport**.

4. **Conclusion**: Therefore, the answer to the question is **uniport**.

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