Pre-RNA vs Mature RNA

Pre-RNA is translated directly into proteins, while mature RNA undergoes splicing

Pre-RNA is only found in the nucleus, while mature RNA is found in the cytoplasm

Pre-RNA contains introns, while mature RNA has the introns removed (correct)

Pre-RNA is single-stranded, while mature RNA is double-stranded

They are added to the mature RNA sequence

They are duplicated

They are translated into proteins

They are spliced out (correct)

Cytoplasm

Endoplasmic reticulum

Mitochondria

Nucleus (correct)