Question

Which is the termination codon on mRNA?

Hint:

Remember the three stop codons: U-A-A, U-A-G, U-G-A.

Answer 1

Step 1: Understanding codons:
Of the 64 possible mRNA codons, 61 code for amino acids and 3 do not code for any amino acid — instead they signal the ribosome to stop translation.

Step 2: Naming the stop codons:
These three termination (stop) codons are UAA, UAG and UGA.

Final Answer:
The termination codons on mRNA are UAA, UAG and UGA.