BIOCHEM C785 pre assessment #3

5' TTG TTA CTG 3 3’ GTC ATT GTT 5’ 3’ GTT ATT GTC 5’ 3' TTG TTA CTG 5 The correct answer is 3' TTG TTA CTG 5'. Remember complementary means “Matching or Pairing” You have to remember to pay attention to your numbers as well as your letters (A-T, G- C, 5'-3'). The correct answer is 3’ CAG TAA CAA 5’ (original sequence) 5’ GTC ATT GTT 3’ (complementary sequence) But we asked for it in the 3’ direction, so mirror answer to give correct answer: 3’ TTG TTA CTG 5’ Correct answers: 3' TTG TTA CTG 5 Gln Leu His The correct answer is Gln Leu His. We are starting at the coding strand, and have to remember the relationship between coding DNA and mRNA. These two strands are non-complementary and parallel. So we copy the coding strand , change T ---> U, and then write the mRNA sequence: 3’ TAC GTT AAC 5’ coding 3’ UAC GUU AAC 5’ mRNA Mirror by changing orientation: 5’ CAA UUG CAU 3’ Read chart Gln Leu His (chart is in direction of 5' ---> 3') If you chose Met Gln Leu, this answer is incorrect because this is the amino acid sequence that results from the mRNA 5' AUG CAA UUG 3' which would have been complementary to the given coding strand. Coding DNA is non-complementary and parallel to mRNA. Met Gln Leu Ile Asp Val Gln Ile Met Correct answers: Gln Leu His 33, Which amino acid sequence would be made from this template DNA strand? 5’ AGT TAT AAC 3’?Required to answer. Single choice. (0/1 Point) Met Leu Thr Val Ile Thr Ser Tyr Asn The correct answer is Val Ile Thr because 5’ AGT TAT AAC 3’ template is complementary and antiparallel so 3’ UCA AUA UUG 5’ but it is in the wrong orientation, so mirror 5’ GUU AUA ACU 3’ and read the chart Val Ile Thr Gln Tyr Your answer to question 3 is wrong. Correct answers: Val Ile Thr