Having a hard time with these two questions.

Question

Processing of ribosomal RNA (rRNA) includes all of the following EXCEPT:
1. snoRNA-dependent trimming.

2. snoRNA-dependent nucleotide modification.

3. snoRNA-dependent splicing.

4. snoRNA-dependent cleavage.

tRNA molecules:
1. are comprised of the standard four nucleotides.

2. None of the above.

3. have their amino acid ATTACHED covalently at the 5’ end.

4. have a triplet codon that interacts with mRNA.

Answer 1

...don't bother replying if your response is 'idk.'

The answer to your first problem is 'splicing.' My book mentions snoRNA's role in rRNA modification, assembly and cleavage.

tRNA molecules have more than 4 standard nucleotides, the amino acid is attached at the 3' end, and they have anticodons to interact with mRNA. So the correct answer is 'none of the above.'

Hope that helps.

Answer 2

Thank you for the help and explanations, Sam! Very much appreciated.