The codons is read in mRNA in a contiguous fashion there are no_____.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question states that codons in mRNA are read in a contiguous fashion, and we need to identify what is absent that allows for this continuous reading.

2. **Defining Codons**: Codons are sequences of three nucleotides in mRNA that correspond to specific amino acids during protein synthesis.

3. **Contiguous Reading**: The term "contiguous" means that the codons are read one after the other without any interruptions.

4. **Identifying the Absence**: The continuous reading of codons implies that there are no interruptions or breaks. In this context, the absence of certain elements is crucial.

5. **Conclusion**: The correct completion of the statement is that there are no "punctuations" between the codons in mRNA. This means that the codons are read continuously without any spaces or breaks.

6. **Final Statement**: Therefore, the complete sentence is: "The codons are read in mRNA in a contiguous fashion; there are no punctuation marks."

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