homework1 - 2. a) b) Not all genes code for proteins --...

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Quiz Section 1 Part 4. Practice questions - Homework 1. Intron Region I Both exons have to be on the same pre-mRNA. Look at the ORFs on either side of region II. The template strand for the ORF just left of region II is the Watson strand, while the template for the ORF to the right of region II is the Crick strand… so those two ORFs would be on separate transcripts, transcribed in opposite directions.
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Unformatted text preview: 2. a) b) Not all genes code for proteins -- genes that encode tRNAs and ribosomal RNAs (the RNA components of ribosomes) are examples. Since such a gene doesn't have to code for a string of amino acids, there is no reason to expect that it would have an open reading frame....
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