5’______ and 3’ ____ is the sequence for two ends of an intron.

5-and-3-is-the-sequence-for-two-ends-of-an-intron

5’______ and 3’ ____ is the sequence for two ends of an intron.

A. GA TC

B. GU AG

C. AG TA

D. GA AT

I have been asked this question in unit test.

This interesting question is from Post-Transcriptional Modification in chapter Gene Expression : Transcription Prokaryotes of Cytogenetics

Right choice is B. GU AG

The best explanation: The 5’ end of the splice site has the sequence GU, the 3’ end has the sequence AG. These help to locate the intron but more determining factors exist.