Which nucleotide is added to the end of a completed messenger RNA transcript?
A) adenine
B) thymine
C) cytosine
D) guanine
E) alternating adenine and thymine

Question

Which nucleotide is added to the end of a completed messenger RNA transcript?​
A) ​adenine
B) ​thymine
C) ​cytosine
D) ​guanine
E) ​alternating adenine and thymine

Quizplus · Accepted Answer

In eukaryotic cells, a string of adenine nucleotides, known as a poly(A) tail, is added to the 3' end of the mRNA transcript during post-transcriptional modification. This process is not observed with thymine, cytosine, guanine, or alternating adenine and thymine.

Which Nucleotide Is Added to the End of a Completed