The effect differs. It could produce a different amino acid in the sequence because the corresponding codon has changed. It could also prevent the production of the originally intended sequence by changing one of the amino acids of a "start" codon (aka AUG) or extend the protein's sequence by modifying a "stop" codon (UAA, UAG, UGA or UGG), producing a new protein that might be useless or have different effects on the cell.
The mRNA needs to copy the gene sequence of the dna before it leaves the nucleus to the tRNA and rRNA
MRNA has a complex secondary structure; 3D. While tRNA is more like an X figure.
Answer:
not very sure what your question if you can upload again the question that will be great
The nucleus is responsible for storing dna as well as the instuctions for protein synthesis
