Which of the mRNA sequences would be translated in a test tube as the three diff

Question

Which of the mRNA sequences would be translated in a test tube as the three different polypeptide chains polyserine, polyglutamine, and polyvaline, assuming that laboratory conditions were such that translation could start anywhere along the mRNA molecule? 1. 5'–ACUGACUGACUG….–3' 2. 5'–GUCAGUCAGUCA….–3' 3. 5'–AUCGAUCGAUCG….–3' 4. 5'–GCUAGCUAGCUA….–3' 5. None of the other answer options is correct. Which of the mRNA sequences would be translated in a test tube as the three different polypeptide chains polyserine, polyglutamine, and polyvaline, assuming that laboratory conditions were such that translation could start anywhere along the mRNA molecule? 1. 5'–ACUGACUGACUG….–3' 2. 5'–GUCAGUCAGUCA….–3' 3. 5'–AUCGAUCGAUCG….–3' 4. 5'–GCUAGCUAGCUA….–3' 5. None of the other answer options is correct.

Explanation / Answer

Out of the given mRNA sequences, the one that would be translated in a test tube as the three different polypeptide chains: polyserine, polyglutamine, and polyvaline (while assuming that laboratory conditions were such that translation could start anywhere along the mRNA molecule), would be the mRNA whose any 3 set of contiguous nucleotides constituting a codon, encode for one of the 3 mentioned amino acids. That particular codon pattern now needs to repeat for the peptide to become a polypeptide.
Since no option from 1. to 4. contains a repeating 3-nucleotide codon sequnce.
Hence, 5. None of the other answer options is correct. ANSWER

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