Select the odd on out

Options

A. The movement of water across a semi permeable membrane is affected by the amount of substances dissolved in it
B. Membranes are made of organic molecules like proteins and lipids
C. Molecules soluble in organic solvents can easily pass through the membrane.
D. Plasma membranes contain chitin sugar in plants

Explanation

To solve the question of selecting the odd one out, we need to analyze each statement provided. Here’s the step-by-step breakdown:

### Step 1: Analyze the first statement
- **Statement:** The movement of water across a semi-permeable membrane is affected by the amount of substance dissolved in it.
- **Analysis:** This statement is correct. The movement of water (osmosis) is indeed influenced by the concentration of solutes in the solution.

### Step 2: Analyze the second statement
- **Statement:** The membranes are made of organic molecules like proteins and lipids.
- **Analysis:** This statement is also correct. Biological membranes, including the plasma membrane, are primarily composed of proteins and lipids, as described by the fluid mosaic model.

### Step 3: Analyze the third statement
- **Statement:** Molecules soluble in organic solvents can easily pass through the membrane.
- **Analysis:** This statement is correct as well. Since the membrane is made of lipids, which are organic molecules, substances that are soluble in organic solvents can pass through the membrane more easily.

### Step 4: Analyze the fourth statement
- **Statement:** Plasma membrane contains chitin sugar in plants.
- **Analysis:** This statement is incorrect. The plasma membrane is composed of proteins and lipids, and it does not contain chitin, which is a component of fungal cell walls, not plant plasma membranes.

### Conclusion
- The odd one out is the fourth statement, as it is the only incorrect statement among the four provided.

### Final Answer
The odd one out is: **Plasma membrane contains chitin sugar in plants.**

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