Which of the following is NOT true of RNA processing in eukaryotic cells?

• A. RNA processing includes the addition of a poly-A tail.
• B. RNA processing involves the removal of introns.
• C. RNA processing occurs in the cytoplasm.
• D. RNA processing includes the addition of a 5' cap.

Answer: (C)

Verified step by step guidance

1. Understand that RNA processing in eukaryotic cells is a series of modifications that pre-mRNA undergoes before becoming mature mRNA.
2. Recognize that one of the key steps in RNA processing is the addition of a 5' cap, which is a modified guanine nucleotide added to the beginning of the RNA transcript.
3. Identify that another important step is the addition of a poly-A tail, which involves adding a series of adenine nucleotides to the 3' end of the RNA molecule.
4. Acknowledge that RNA splicing is a crucial part of RNA processing, where introns (non-coding regions) are removed, and exons (coding regions) are joined together.
5. Note that RNA processing occurs in the nucleus of eukaryotic cells, not in the cytoplasm, which makes the statement 'RNA processing occurs in the cytoplasm' incorrect.