Types of RNA (For genetics final)

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6 Terms

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tRNA (functional) (constitutive)

Carry amino acids to the ribosome for protein synthesis; transcribed by RNA polymerase III in eukaryotes

2
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rRNA (functional) (constitutive)

RNA components of the ribosome; are both structural and “enzymatic.” Transcribed by RNA polymerase I, except 5S(?) which is transcribed by pol III in eukaryotes

3
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snRNA (functional) (constitutive)

Involved in splicing of eukaryotic RNAs into mRNA (transcribed by pol II and III; only in eukaryotes).

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miRNA (functional) (regulated)

Processed from larger RNAs; regulate translation (pol II; only euks)

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siRNA/piRNA (functional) (constitutive)

small RNAs that are part of the RNAi pathway; help prevent transposon and viral mobilization, also involved in making heterochromatin (compacted DNA and proteins; pol II, only eukaryotes)

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mRNA (protein-coding) (regulated)

encode the cellular proteins (pol II in eukaryotes)