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Biology 7 Online
OpenStudy (anonymous):

Where do the instructions for building a protein come from originally? rRNA DNA mRNA tRNA

OpenStudy (neonumbrella5115):

What do you think so far? Have you ruled any choices out?

OpenStudy (s.gracex):

The instructions for building a protein originally come from DNA, but then go through Transcription and Translation with the other three choices to eventually become a protein :p

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