DNA Review

Review DNA structure & base pairing! Fill in missing DNA bases and calculate percentages.

Quick Review of DNA Watch the video to get a quick refresher on DNA before getting started on your worksheet Fix my DNA! My DNA strand is missing some of it's bases! Use the letters:ATCGto fill in the blank spots so my DNA is correct!(Click on the blue circles to fill in the gaps of my DNA) A A G G T C T G Complementary Base Pairing Refresher Remember that complementary base pairingmeans that C-G and A-T. Because of this, there should always be equal amounts of Cs to Gs and equal amounts of As to Ts. Take a look at the picture here....There are 5 total thymines (Ts) in the DNA strand.. which means there should be 5 total Adenines (As)There are 3 total cytosines (Cs) in the DNA strand... which means there should be 3 total guanines (Gs) If I have a DNA molecule that is 22% adenine.... what percent will be thymine? 44 22 11 none Complementary Base Pairing Practice Use your knowledge of complementary base pairing to fill in the table with the percentage of each type of base in 5 different organisms ORGANISM NAME Adenine (A) Guanine (G) Cytosine (C) Thymine (T) Human 31 19 19 31 Cow 28 22 22 28 Salmon 29 21 21 29 Wheat 27 23 23 27 Yeast 31 19 19 31