Multiple choice

Which of the following statements does NOT characterise RNA editing in both plants and animals?

  1. After editing, all amino acids at the number 228 position are converted to cysteine.

  2. The RNA editing events occur at random in the transcript.

  3. The primary benefit of RNA editing could be evolutionary conservation of protein structure.

  4. Plant mitochondria do not use the universal genetic code.

  5. Editing converts a tryptophan codon to methionine codon.
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E Correct answer
Explanation

Structural RNAs such as tRNAs and rRNAs are also affected. Editing can convert a tryptophan codon to arginine codon (CGG to UGG).

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