The codons causing chain termination (stop codons) are

Options

A. AGT,TAG ,UGA
B. UGA,UGA,UAA
C. TAG,TAA,TGA
D. GAT,AAT,AGT

Answer

**Step-by-Step Solution:**

1. **Understanding Codons**: Codons are sequences of three nucleotides in mRNA that correspond to specific amino acids or signal the termination of protein synthesis.

2. **Start and Stop Codons**: In the process of translation, the ribosome reads the mRNA sequence. The translation begins with a start codon (AUG) and ends with stop codons.

3. **Identifying Stop Codons**: The stop codons are specific sequences that signal the end of protein synthesis. There are three known stop codons in the genetic code.

4. **Listing the Stop Codons**: The three stop codons are:
- UAA
- UAG
- UGA

5. **Conclusion**: Therefore, the codons causing chain termination (stop codons) are UAA, UAG, and UGA.

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