`CH_(3)-(CH_(2))_(14)-COOH`
The above is the formula of -

Options

A. Phospholipid
B. Palmitic acid
C. Triglyceride
D. Arachidonic acid

Answer

To determine what the formula `CH₃-(CH₂)₁₄-COOH` represents, we can follow these steps:

### Step 1: Identify the Components of the Formula
The formula consists of two main parts:
- `CH₃`: This represents a methyl group.
- `-(CH₂)₁₄-`: This indicates a long chain of 14 methylene (CH₂) groups.
- `-COOH`: This is the carboxylic acid functional group.

### Step 2: Count the Total Number of Carbon Atoms
To find the total number of carbon atoms in the structure:
- The methyl group contributes 1 carbon.
- The 14 methylene groups contribute 14 carbons.
- The carboxylic acid group contributes 1 carbon.

So, the total number of carbon atoms is:
1 (from CH₃) + 14 (from CH₂) + 1 (from COOH) = 16 carbons.

### Step 3: Determine the Type of Compound
Since we have a long-chain carboxylic acid with 16 carbon atoms, we can classify it as a fatty acid. Specifically, this compound is known as palmitic acid, which is a saturated fatty acid.

### Step 4: Verify Against Other Options
- **Phospholipid**: Incorrect, as there is no phosphate group present.
- **Triglyceride**: Incorrect, as triglycerides contain three fatty acids attached to glycerol.
- **Arachidonic Acid**: Incorrect, as arachidonic acid is an unsaturated fatty acid with double bonds.

### Conclusion
The formula `CH₃-(CH₂)₁₄-COOH` represents **palmitic acid**.

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