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nmdcat.online June 27, 2026

Among the following statements, the one that correctly describes a key structural difference between DNA and RNA is

A. DNA contains uracil, while RNA contains thymine
B. DNA has a ribose sugar, while RNA has a deoxyribose sugar
C. DNA is typically double-stranded, while RNA is typically single-stranded
✓
D. DNA contains amino acids, while RNA contains nucleotides

📝 Explanation

The most fundamental structural difference is that DNA is a stable, double-stranded helix, whereas RNA is usually single-stranded. While sugar differences (deoxyribose vs. ribose) are also key, the overall strandedness is a major distinguishing feature. DNA contains thymine, RNA contains uracil.

📖 Additional Information

  • DNA contains uracil, while RNA contains thymine
  • DNA has a ribose sugar, while RNA has a deoxyribose sugar
  • DNA is typically double-stranded, while RNA is typically single-stranded
  • DNA contains amino acids, while RNA contains nucleotides

The most fundamental structural difference is that DNA is a stable, double-stranded helix, whereas RNA is usually single-stranded. While sugar differences (deoxyribose vs. ribose) are also key, the overall strandedness is a major distinguishing feature. DNA contains thymine, RNA contains uracil.

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