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Initiation codon for methionine is :...

Initiation codon for methionine is :

A

AAA

B

UUU

C

UAA

D

AUG

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding Codons**: Codons are sequences of three nucleotides (triplets) in mRNA that correspond to specific amino acids or stop signals during protein synthesis. 2. **Identifying the Initiation Codon**: The initiation codon is the specific codon that signals the start of translation and also codes for the first amino acid in the protein sequence. 3. **Recognizing Methionine**: Methionine is the amino acid that is coded by the initiation codon. In the genetic code, methionine is represented by the codon AUG. 4. **Verifying the Codon**: - AUG is known to be the start codon for protein synthesis in both eukaryotes and prokaryotes. - In eukaryotes, it codes for methionine, while in prokaryotes, it codes for a modified form called N-formylmethionine. 5. **Eliminating Other Options**: - AAA codes for lysine. - UUU codes for phenylalanine. - UAA is a stop codon. - UGA is also a stop codon. - UAG is another stop codon. 6. **Conclusion**: The initiation codon for methionine is AUG. ### Final Answer: The initiation codon for methionine is **AUG**. ---
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