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GATE BT 2026 | Question: 32

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Messenger $\text{RNAs (mRNAs)}$ translate to generate polypeptides and the translation terminates at the $\text{UGA, UAG}$ or $\text{UAA}$ stop codons. The $\text{AGA}$ codon acts as additional stop codon in the mitochondria. The longest possible polypeptide(s) that can be hypothetically translated in the cytosol and/or mitochondria, from the given full length $\text{mRNA}$ sequence ($36$ nucleotides) is/are

$\text{5'-AACACCAUGACCCAUGUGGCGAGACGGUAGUUAAAA- 3'}$

  1. $7$ amino acids long in the cytosol
  2. $5$ amino acids long in the mitochondria
  3. $6$ amino acids long in the mitochondria
  4. $8$ amino acids long in the cytosol

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