Multiple Choice
Which process is carried out by the spliceosome?
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10. Transcription
RNA Modification and Processing
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Most mature eukaryotic mRNAs have a string of nucleotides at their 3' end referred to as a poly-what?
A
poly-A tail
B
poly-C sequence
C
poly-G cap
D
poly-T leader
Verified step by step guidance1
Understand that the question is asking about a specific nucleotide sequence found at the 3' end of most mature eukaryotic mRNAs.
Recall that during mRNA processing in eukaryotes, a special sequence is added to the 3' end to protect the mRNA from degradation and assist in translation.
Identify that this sequence is a chain of adenine nucleotides, commonly referred to as the poly-A tail.
Recognize that the other options (poly-C sequence, poly-G cap, poly-T leader) do not correspond to known features of mature eukaryotic mRNA.
Conclude that the correct term for the string of nucleotides at the 3' end of mature eukaryotic mRNAs is the poly-A tail.
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