Final answer:
tRNA modifications serve roles in accurate translation, stability and folding of tRNA, and regulation of protein synthesis.
Step-by-step explanation:
tRNA modifications serve several roles in the translation process. Firstly, they help in accurate translation by ensuring the correct amino acid is added to the polypeptide chain. Additionally, tRNA modifications can affect the stability and folding of tRNA molecules, enabling them to interact with ribosomes and mRNA more efficiently. Finally, certain modifications can also regulate the activity of tRNA molecules and influence the fidelity of protein synthesis.