Select the odd one out

Options

A. the movement of water across a semipermeable membrane is affected by the amound of substances dissolvbed in it,
B. membranes are made of organic molecules such as proteins and lipids.
C. molecules soluble in organic solvents can easily pass through the membrane.
D. plasma membranes contain chitin sugar in plants.

Answer

To solve the question "Select the odd one out," we will analyze each statement provided and determine which one does not fit with the others.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- The first statement mentions the movement of water across a semi-permeable membrane.
- This is a true statement as semi-permeable membranes allow certain substances, like water, to pass through.

2. **Analyze the Second Statement:**
- The second statement states that the membrane is made up of organic molecules such as proteins and lipids.
- This is also true, as cell membranes are primarily composed of phospholipids and proteins.

3. **Analyze the Third Statement:**
- The third statement claims that molecules soluble in organic solvents can easily pass through the membrane.
- This statement is accurate because organic solvents can typically permeate the lipid bilayer of the membrane.

4. **Analyze the Fourth Statement:**
- The fourth statement asserts that the plasma membrane contains chitin sugar in plants.
- This statement is incorrect. Chitin is a component of fungal cell walls, not plant cell membranes. Plant cell membranes primarily contain cellulose, not chitin.

5. **Conclusion:**
- Based on the analysis, the fourth statement is the odd one out because it contains incorrect information about the composition of the plasma membrane in plants.

### Final Answer:
- The odd one out is **option 4**: "plasma membrane contains chitin sugar in plants."