Question

Which of the following is an initial codon?

• A. UGA
• B. GUA
• C. AUG
• D. All of these

Hint:

AUG is the universal start codon that signals the beginning of protein synthesis.

Answer 1

The Correct Option is C

Step 1: Understand codons.
An initial codon (start codon) is a specific sequence in mRNA that signals the start of translation. The most common start codon is AUG, which codes for methionine.
Step 2: Review the options.
- UGA is a stop codon, not a start codon. - GUA is a codon for valine but is not the start codon. - AUG is the correct start codon, coding for methionine. - "All of these" is incorrect because only AUG is the start codon.
Step 3: Conclude.
The correct initial codon is AUG, making option (C) the correct answer.
Final Answer: \[ \boxed{\text{AUG}} \]