200
Which of the following is true regarding deoxyribonnucleic acid (DNA)? A. Each deoxyribonucleic acid molecule is composed of two long chains of nucleotides arranged in a double helix. B. Genes are composed of deoxyribonucleic acid. C. DNA is composed of chemical building blocks called nucleotides. D. Only a and c are correct E. a, b, and c are correct.
E. a, b, and c are correct.