Which one of the following statements is not correct?

Options

A. All fattly acids have a carboxyl group at one end
B. Like carbohydrates, fatty acids have more oxygen than hydrogen
C. Saturated fatty acids are soilds at room temperature
D. Glycerol is a component of phospho liqids

Answer

To determine which statement is not correct, let's analyze each option provided in the question.

### Step-by-Step Solution:

1. **Analyze the First Statement: "All fatty acids have a carboxyl group at one end."**
- Fatty acids are organic compounds that consist of a hydrocarbon chain and a carboxyl group (-COOH) at one end.
- This statement is **true** because every fatty acid indeed has a carboxyl group.

2. **Analyze the Second Statement: "Like carbohydrates, fatty acids have more oxygen than hydrogen."**
- Carbohydrates typically have a ratio of carbon to hydrogen to oxygen of 1:2:1. However, fatty acids have a different ratio, generally having more hydrogen than oxygen.
- For example, in fatty acids, the ratio of hydrogen to oxygen is greater than 2:1, meaning they have less oxygen compared to hydrogen.
- Therefore, this statement is **incorrect**.

3. **Analyze the Third Statement: "Saturated fatty acids are solid at room temperature."**
- Saturated fatty acids have no double bonds between carbon atoms, which allows them to pack closely together, making them solid at room temperature (e.g., butter).
- This statement is **true**.

4. **Analyze the Fourth Statement: "Glycerol is a component of phospholipid."**
- Glycerol is indeed a backbone component of phospholipids, which are essential for cell membranes.
- This statement is also **true**.

### Conclusion:
The statement that is not correct is: **"Like carbohydrates, fatty acids have more oxygen than hydrogen."**

### Final Answer:
The incorrect statement is the second one.

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