Ribonucleic acid (RNA) and deoxyribonucleic acid (DNA) differ structurally in that
A) DNA is single-stranded, and RNA is double-stranded.
B) DNA contains uracil.
C) RNA bonds purines to purines, and DNA bonds pyrimidines to pyrimidines.
D) DNA contains deoxyribose, and RNA does not.
Answer: D) DNA contains deoxyribose, and RNA does not.