Identify the triplet codons, which code for the amino acids serine and proline.
I. UCC `" "`II. CCA `" "`III. AAG `" "` IV. GGG

Options

A. I and III
B. II and IV
C. III and IV
D. I and II

Answer

To solve the question of identifying the triplet codons that code for the amino acids serine and proline, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Codons**: A codon is a sequence of three nucleotides in mRNA that corresponds to a specific amino acid. We need to identify which of the provided codons correspond to serine and proline.

2. **List the Given Codons**: The codons provided in the question are:
- I. UCC
- II. CCA
- III. AAG
- IV. GGG

3. **Identify the Amino Acids**:
- Using a codon chart or genetic code reference, we can determine which amino acids are coded by each of the given codons:
- UCC codes for **serine**.
- CCA codes for **proline**.
- AAG codes for **lysine**.
- GGG codes for **glycine**.

4. **Select the Correct Codons**: From the identification:
- The codon for serine is **UCC** (I).
- The codon for proline is **CCA** (II).

5. **Conclusion**: The triplet codons that code for serine and proline are:
- I. UCC (serine)
- II. CCA (proline)

### Final Answer:
The correct triplet codons that code for the amino acids serine and proline are:
- I. UCC
- II. CCA

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