Question:
Which one is known as ochre ?
Which one is known as ochre ?
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All three stop codons have nicknames: UAG-amber, UGA-opal, UAA-?
Updated On: Jul 4, 2026
- UAA
- UGA
- UAG
- AUG
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The Correct Option is A
Solution and Explanation
Step 1: The genetic code has three stop (nonsense) codons that do not code for any amino acid: UAA, UAG and UGA.
Step 2: Each of these has a nickname given by early geneticists. UAG is called amber, UGA is called opal (or umber), and UAA is called ochre.
Step 3: AUG is not a stop codon at all, it is the start codon coding for methionine, so option (D) is wrong.
Step 4: Since the question asks which codon is called ochre, the answer is UAA.
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