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13_08aDNADoubleHelix_A.mp4 duration 54 seconds 13_08aDNADoubleHelix_A.mp4 13_08aDNADoubleHelix_A.mp4	13_08aDNADoubleHelix_A.mp4 backbones model helix phosphate sugar dna ribbons ribbon simplicity ball cytosine guanine thymine adenine strand bases pair hydrogen crossbar bars From Rachel Petrofes Chapa 0 likes 0
1314 5.3.1 duration 3 minutes 48 seconds 1314 5.3.1 1314 5.3.1	1314 5.3.1 Determinant of a 2 x 2 Matrix college algebra math 1314 douglas bump mathematics hcc times matrix row determinant column a11 numbers minus lines array a21 minute brackets a12 a. difference slide opening bars determinants From Marisol Montemayor 0 likes 0