The codon is a _____

Options

A. singlet
B. duplet
C. triplet
D. quadruplet

Answer

To answer the question "The codon is a _____," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Definition of a Codon**:
A codon is a sequence of nucleotides in DNA or RNA that corresponds to a specific amino acid or a stop signal during protein synthesis.

2. **Identifying the Structure of a Codon**:
Codons are made up of three nucleotides. Each nucleotide can be one of four bases (adenine, thymine, cytosine, or guanine in DNA; uracil replaces thymine in RNA).

3. **Analyzing the Options**:
The question provides four options: singlet, triplet, duplet, or quadruplet. Since we know that a codon consists of three nucleotides, we can eliminate the options that do not match this structure.

4. **Confirming the Correct Answer**:
The correct answer is "triplet" because a codon is defined as a sequence of three nucleotides that codes for an amino acid or a stop signal.

5. **Conclusion**:
Therefore, the complete answer to the question is: "The codon is a triplet."