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nmdcat.online June 27, 2026

In the structure of a nucleotide, the nitrogenous base is attached to the pentose sugar at the

A. 1' carbon via a glycosidic bond
✓
B. 3' carbon via a phosphodiester bond
C. 5' carbon via a phosphate bond
D. 2' carbon via a hydrogen bond

📝 Explanation

The covalent bond linking the nitrogenous base (purine or pyrimidine) to the 1' carbon of the pentose sugar (ribose or deoxyribose) is an N-glycosidic bond. The phosphate group is linked to the 5' carbon.

📖 Additional Information

  • 1' carbon via a glycosidic bond
  • 3' carbon via a phosphodiester bond
  • 5' carbon via a phosphate bond
  • 2' carbon via a hydrogen bond

The covalent bond linking the nitrogenous base (purine or pyrimidine) to the 1' carbon of the pentose sugar (ribose or deoxyribose) is an N-glycosidic bond. The phosphate group is linked to the 5' carbon.

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