Select the incorrect statement.

Options

A. Osmosis is a slow process, occurs down the concentration gradient and does not expend energy.
B. Electron microscope uses very high voltage electricity. It uses electromagnets instead of glass lenses and beam of electrons instead of light.
C. A semipermeable membrane does not allow both solvent and solute molecules to pass through it.
D. Active transport of materials is rapid and usually occurs against the concentration gradient involving carrier proteins and energy in the form of ATP.

Explanation

To solve the question of selecting the incorrect statement, we will analyze each option provided in the video transcript step by step.

### Step-by-Step Solution:

1. **Understanding Osmosis**:
- The first statement mentions that "osmosis is a slow process that occurs down the concentration gradient and does not expend energy."
- This statement is **correct** because osmosis involves the movement of water from an area of higher concentration to an area of lower concentration without the use of energy.

2. **Understanding Electron Microscopes**:
- The second statement explains that "electron microscopes use very high voltage electricity, electromagnets instead of glass lenses, and a beam of electrons instead of light."
- This statement is also **correct**. Electron microscopes utilize electron beams and electromagnets to focus the image, which is different from traditional light microscopes.

3. **Understanding Semi-Permeable Membranes**:
- The third statement claims that "a semi-permeable membrane does not allow both solvent and solute molecules to pass through it."
- This statement is **incorrect**. A semi-permeable membrane allows the solvent (like water) to pass through while restricting certain solute molecules. Thus, it does not prevent all movement.

4. **Understanding Active Transport**:
- The fourth statement describes that "active transport of material is rapid and usually occurs against the concentration gradient involving carrier proteins and energy in the form of ATP."
- This statement is **correct**. Active transport requires energy (ATP) to move substances against their concentration gradient, and it is indeed a rapid process.

### Conclusion:
Based on the analysis, the **incorrect statement** is the third one regarding the semi-permeable membrane.

### Final Answer:
The incorrect statement is: "A semi-permeable membrane does not allow both solvent and solute molecules to pass through it."

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