200
E. a, b, and c are correct.
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.