What processing step enhances the stability of pretRNAs and pre-rRNAs?

a. methylation

b. nucleotide modification

c. cleavage

d. splicing

The process through which information encoded in mRNA is translated into amino acid during protein synthesis is known as translation.

Option a is correct because the methyl functional group is added to some bases of pre-RNA and pre-tRNA for stability. RNA methylation is the post-transcriptional level of regulation in which –CH₃ moiety or methyl functional group is added for stability. It regulates the transcription of mRNA, nucleation, stability, and translation and as a result, it overall controls the expression of the proteins.

Option b is incorrect because the modified nucleotide occurs in all three forms of RNA.

Option c is incorrect because Cleavage refers to division or separation. it may be exonucleolytic - removing the end nucleotide, or endonucleolytic - splitting the strand in two,

Option d is incorrect because splicing is the excision of introns and joining of exons to form mature messenger RNA.