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Initiator codons...

Initiator codons

A

AUA and UAG

B

UGA and AUG

C

UAA and AUG

D

AUG and GUG

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding Initiator Codons**: Initiator codons are specific sequences of nucleotides in mRNA that signal the start of translation. The most common initiator codon is AUG, which codes for the amino acid Methionine. 2. **Identifying Stop Codons**: The question mentions several codons, and it is important to differentiate between initiator and stop codons. The stop codons are UAG, UAA, and UGA. These codons signal the termination of protein synthesis. 3. **Analyzing the Options**: - **Option 1: AUA and UAG**: UAG is a stop codon, so this option is incorrect. - **Option 2: UGA and AUG**: UGA is a stop codon, making this option incorrect as well. - **Option 3: UAA and AUG**: UAA is a stop codon, so this option is also incorrect. - **Option 4: AUG and GUG**: AUG is the initiator codon, and GUG can also serve as an initiator codon in some cases, although it primarily codes for Valine. This option is correct. 4. **Conclusion**: The correct answer is option number four, which includes the initiator codon AUG.
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Which of the following is initiation codon:

Name the initiation codon for protein synthesis. Name the amino acid it codes for.