Which of the following are the post-transcriptional events in a eukaryotic cell? A. Transport of pre-mRNA to cytoplasm prior to s…

Question

Which of the following are the post-transcriptional events in a eukaryotic cell? A. Transport of pre-mRNA to cytoplasm prior to splicing. B. Removal of introns and joining of exons. C. Addition of methyl group at 5' end of hnRNA. D. Addition of adenine residues at 3' end of hnRNA. E. Base pairing of two complementary RNAs.

Choose the correct answer from the options given below:

1. A. A, B, C only
2. B. B, C, D only (Correct answer)
3. C. B, C, E only
4. D. C, D, E only

Correct Answer

Option B — B, C, D only

Detailed Solution & Explanation

The correct answer is B, C, D only.

Key Points

• Post-transcriptional processing of hnRNA includes splicing (removal of introns and joining of exons, B), 5' capping (addition of a methyl guanosine cap, C) and 3' polyadenylation (addition of adenine residues, D).
• A is wrong because splicing occurs before transport to the cytoplasm; E (base pairing of two complementary RNAs) is not a post-transcriptional processing event.