Final answer:
tRNAs play a significant role in protein synthesis, they ensure the correct amino acids are delivered based on the codons on mRNA. After delivering the amino acids, they are not destroyed, they return to the cytoplasm for reuse.
Step-by-step explanation:
tRNAs, also known as transfer RNAs, play an essential role in protein synthesis. In a process called translation, tRNA molecules are responsible for bringing the correct amino acids into place on the ribosome at the right time to properly build the protein. Each tRNA molecule is capable of attaching to a specific amino acid and has an anti-codon that matches the codon on the mRNA sequence. In this way, tRNAs ensure the correct amino acid is delivered for protein synthesis.
After delivering the amino acid, tRNAs are not destroyed. They are instead recycled and return to the cytoplasm to attach to another amino acid. So, the correct answer to your question is the combination of the roles and actions concerning tRNAs highlighted in option 1 with the addition that tRNAs remain for reuse instead of being destroyed.
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