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mRNA or messenger RNA has to carry the protein code from the nucleus to the cytoplasm for protein synthesis. It is like a VERY long sentence (or word) in a book. Proteins, being complex need a lot of letters so they are strung out. The other types of RNA, tRNA (transfer RNA) and rRNA (ribosomal RNA) have different functions and do not have to be so long. tRNA only has to carry a single amino acid (protein building block) and rRNA is used to attach this to the end of a protein.

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15y ago
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Q: Why is important for mRNA to have a long thin structure?
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