How does the first nucleotide at the 5' end of a new mRNA chain differ from the other nucleotides in the chain?
A) The first nucleotide is always a uracil.
B) The first nucleotide is always a cytosine.
C) The first nucleotide retains its triphosphate group, while the others do not.
D) The first nucleotide does not retain its triphosphate group, while the others in the chain do.
E) The first nucleotide is always a modified cytosine.
Correct Answer:
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B)
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