Eukaryotic mRNAs are modified to possess a 5' cap structure. Which one of the following is an INCORRECT statement about the function of the 5 cap structure?
1
It protects the mRNA from 5' → 3' exoribonuclease attack.
2
It facilitates splicing of the nascent transcripts.
3
It protects the transcript from degradation by RNAse III family enzymes.
4
It facilitates attachment to 40S subunit of ribosome.