Question

Which one of the following is the starter codon?

• A. UAA
• B. UGA
• C. UAG
• D. AUG

Answer 1

The correct option is D

AUG

The correct option is (D)

Explanation for the correct option:

1. AUG is the most common start codon.
2. The first AUG in an mRNA's coding region is where processing into protein starts.
3. It both codes for the amino acid methionine and functions as an initiation point.
4. In eukaryotes, the additional start codons given by GenBank are rare and often code for Met/fMet.

Explanation for the incorrect options:

Option (A):

1. It was the second stop codon transformation to be found. Suggestive of the standard yellow-orange-earthy colored tone related to golden.
2. The name "ochre" was given to the second stop codon, which has an orange-rosy earthy-colored mineral shade.

Option (B):

1. The third and last stop codon in the standard hereditary code was found before long, and relates to the nucleotide trio "UGA".

Option (C):

1. After a short-HA ORF, an amber stop codon (UAG) is always inserted at the N-terminus, preventing the production of the untagged protein under uninduced conditions.

Final Answer: AUG is the most starter codon.