NEET 2008 Biology question

Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?

(1)UUA, UCA - Leucine
(2)GUU, GCU - Alanine
(3)UAG, UGA - StopCorrect
(4)AUG, ACG - Start / Methionine

Answer: (3)

Solution

UAA, UAG and UGA are the three stop (termination or nonsense) codons that do not code for any amino acid and end translation. So UAG and UGA are correctly matched with "Stop". Hence

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Question ID VK-090123