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Which of the following exchange rate policies uses a target exchange rate, but allows the target to change?
Poly-A Tail
A stretch of adenine nucleotides added to the 3' end of a newly synthesized pre-mRNA molecule in eukaryotic cells, protecting the mRNA from degradation and aiding in its export from the nucleus.
DNA Molecule
The carrier of genetic information, consisting of two long chains of nucleotides twisted into a double helix.
Promoter
In DNA, a sequence that is a site where RNA polymerase binds and begins transcription.
Codons
Sequences of three nucleotides in mRNA that specify the addition of a specific amino acid or the termination of translation.
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