Problem 48
The structures of tRNAs contain several unusual bases in addition to the typical four. Suggest a function for the unusual bases.
Problem 49
Would you expect mRNA or rRNA to be degraded more quickly in the cell? Why?
Problem 50
Which would be more harmful to a cell, a mutation in DNA or a transcription mistake that leads to an incorrect mRNA? Why?
Problem 51
Explain briefly what happens to eukaryotic mRNA before it can be translated to protein.
Problem 52
Explain why a \(50 \mathrm{S}\) ribosomal subunit and a \(30 \mathrm{S}\) ribosomal subunit combine to form a \(70 \mathrm{S}\) subunit, instead of an \(80 \mathrm{S}\) subunit.
