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Which one of the following pairs of codons in correctly matched with their function or the signal for the particular amino acid?
  • a)
    GUU, GCU - Alanine
  • b)
    UAG, UGA - Stop
  • c)
    AUG, ACG - Start/Methionine
  • d)
    UUA, UCA - Leucine
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which one of the following pairs of codons in correctly matched with ...
GCU indicates alanine but GUU indicates valine. Stop codons are UAG, UGA and UAA. AUG is the most common start codon which also codes for methionine. Stop codons do not have tRNAs. UUA indicates leucine but UAC indicates serine.
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Community Answer
Which one of the following pairs of codons in correctly matched with ...
Explanation:
The correct answer is option B: UAG, UGA - Stop.

Codons and their Functions:
Codons are sequences of three nucleotides on the mRNA that correspond to specific amino acids. They play a crucial role in protein synthesis by determining the order of amino acids in a polypeptide chain.

Stop Codons:
Stop codons signal the termination of protein synthesis. They do not code for any amino acid but act as signals to release the polypeptide chain from the ribosome. There are three stop codons: UAA, UAG, and UGA.

Functions of the Given Codons:
a) GUU, GCU - Alanine: This pair of codons does not match the function or signal for the amino acid alanine. The codons for alanine are GCU, GCC, GCA, and GCG.

b) UAG, UGA - Stop: This pair of codons is correctly matched with their function. UAG and UGA are two of the three stop codons that signal the termination of protein synthesis.

c) AUG, ACG - Start/Methionine: This pair of codons does not match the function or signal for the start codon or methionine. The start codon is always AUG, which also codes for methionine.

d) UUA, UCA - Leucine: This pair of codons does not match the function or signal for the amino acid leucine. The codons for leucine are UUA, UUG, CUU, CUC, CUA, and CUG.

Conclusion:
Among the given pairs of codons, only UAG and UGA are correctly matched with their function as stop codons. Stop codons signal the termination of protein synthesis.
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Which one of the following pairs of codons in correctly matched with their function or the signal for the particular amino acid?a)GUU, GCU - Alanineb)UAG, UGA - Stopc)AUG, ACG - Start/Methionined)UUA, UCA - LeucineCorrect answer is option 'B'. Can you explain this answer?
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