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BIO NMDCAT Structure of DNA
nmdcat.online July 3, 2026

51. The total number of hydrogen bonds holding a short synthetic DNA fragment together containing five G-C pairs and three A-T pairs is

A. Eight
B. Sixteen
C. Twenty-one
✓
D. Twenty-four

📝 Explanation

Each G-C pair has three hydrogen bonds (5×3=15) and each A-T pair has two (3×2=6). The total is 15+6=21.

📖 Additional Information

  • Eight
  • Sixteen
  • Twenty-one
  • Twenty-four

Each G-C pair has three hydrogen bonds (5×3=15) and each A-T pair has two (3×2=6). The total is 15+6=21.

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