Which one of the following pairs is correctly matched with regard
to the codon and the amino acid coded by it?

Options

A. CAC-Lysin
B. AUG-Cysteine
C. UUA-Leucine
D. CCC-Valine

Answer

To solve the question regarding which pair of codon and amino acid is correctly matched, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Codons**:
- A codon is a sequence of three nucleotides that corresponds to a specific amino acid. Each amino acid is coded by one or more codons.

2. **Evaluating the Options**:
- **Option 1: CAC codes for lysine**.
- This is incorrect. The codon CAC actually codes for histidine, not lysine.

- **Option 2: AUG codes for cysteine**.
- This is also incorrect. The codon AUG codes for methionine and is known as the start codon in protein synthesis.

- **Option 3: UUA codes for leucine**.
- This is correct. The codon UUA does indeed code for leucine.

- **Option 4: CCC codes for valine**.
- This is incorrect. The codon CCC codes for proline, not valine.

3. **Conclusion**:
- After evaluating all the options, the only correctly matched pair is **Option 3: UUA codes for leucine**.

### Final Answer:
The correct answer is **Option 3: UUA codes for leucine**.

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