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Download Answer keyDNA Practice problems
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DNA Practice problems-Answer Key 1. If you have a strand of DNA with the following sequence, 3’ G T T A C A A T A G C G T G G C A C C T A C T T G 5’ a. What is the complementary strand of DNA? 3’ G T T A C A A U A G C G T G G C A C C T A C T T G 5’ 5’C A A T G T T A T C G C A C C G T G G A T G A A C 3’ b. If this DNA is transcribed, what is the mRNA? 5’C A A U G U U A U C G C A C C G U G G U U G A A C3’ c. If the mRNA is translated, what is the order of amino acids found in this mRNA to code for a protein? 5’C A A U G -U U A- U C G- C A C- C G U -G G U -U G A- A C3’ start-leu-ser-his-arg-gly-stop 2. What enzyme is responsible for building a complementary strand of DNA? DNA polymerase Which direction does it build a new strand? 5 ‘ to 3’ 3. If you were to replicate the above strand of DNA in this direction ----, from left to right, which of the parent stands is used to build the leading strand of DNA? The lagging strand??? Here is a model for the above DNA strands: 3’-------------------------------5’----this is the parent strand which is used to build the leading stand 5’-------------------------------3’----this is the parent strand which is used to build the lagging strand