The two strands of a DNA molecule are held together by hydrogen bonds between the base pairs.
What are base pairs?
Base pairs may be defined as the unit of double-stranded nucleic acids that are held together by hydrogen bonds. The base pairs include Adenine (A), Thymine (T), Guanine (G), and Cytosine (C).
According to Chargaff's rule, the amount of adenine is always equal to the amount of thymine, while the amount of guanine is always equal to the amount of cytosine.
In the double-stranded molecules of the DNA, Adenine is bound to thymine with the help of two hydrogen bonds, while Guanine is bound to cytosine with the help of three hydrogen bonds.
Therefore, it is well described above.
To learn more about Double-stranded DNA molecules, refer to the link:
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