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Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular Basis of Inheritance1 Mark
MCQ
In a DNA strand the nucleotides are linked together by:
  • A
    Phosphodiester bonds.
  • B
    Glycosidic bonds.
  • C
    Peptide bonds.
  • D
    Hydrogen bonds.
✓

Answer

  1. Phosphodiester bonds.

Explanation:

DNA is made up of two strands of polynucleotide chain in which the two strands are attached with hydrogen bonds. One nucleotide is attached with other nulceotide by phosphodiester bond. Phosphodiester bond is formed between third carbon and fifth carbon of two successive nucleotides.

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