The following diagram shows a protein-coding gene and specifies the positions of
ID: 190341 • Letter: T
Question
The following diagram shows a protein-coding gene and specifies the positions of its translational start and stop signals: Which of the following is correct? A) Upper is template strand, carboxy terminus of protein to right B) Upper is template strand, carboxy terminus of protein to left C) Lower is template strand, carboxy terminus of protein to right D) Lower is template strand, carboxy terminus of protein to left E) Either strand could be template on the basis of this information
CTA CAT
5'----------------//---------------------3'
3'-----------------//--------------------5'
GAT GTA
Explanation / Answer
Answer.
A) Upper is template strand, carboxy terminus of protein to right.
Explanation.
Template strand must starts from 3' with TAC codon. The TAC codon is AUG, which is start codon in mRNA.
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