Transcription and RNA Processing · Zoology

Which enzyme complex carries out the process of RNA editing, such as the C-to-U conversion in apolipoprotein B mRNA?

  1. Spliceosome
  2. Deaminase enzymes
  3. RNA polymerase II
  4. Aminoacyl-tRNA synthetase
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Correct answer: Deaminase enzymes

RNA editing involves the chemical modification of specific bases after transcription. For example, cytidine deaminase can convert cytosine to uracil, creating a premature stop codon that results in a shorter version of the protein in specific tissues.

Difficulty: Medium Question 12 of 20

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