You can access this question in a Word document online.
Find the intron:
You’ve cloned and sequenced a piece of DNA and you know that it contains a gene for the protein you’ve been working to characterize. The protein contains the amino acid sequence:
Write out the full pre-mRNA, including identifying the ends. Assume that your sequenced DNA would have had the promoter to the left and that the first nucleotide is at the -3 position. Circle the intron in your mRNA. Write out the full polypeptide, and label its ends as well.
Try the question yourself before accessing the YouTube solution below:
(You can get a larger image by clicking on the YouTube logo in the bottom-right hand corner of the video above).
If you want to try out a dynamic game that creates a new question each time you run it, go to http://www2.mtroyal.ca/~tnickle/2101/cgi-shl/sampleFindIntron.cgi