The nucleotides are joined to one another in a chain by covalent bonds between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar-phosphate backbone.
Nukleotiderne forbindes med hinanden i en kæde af kovalente bindinger mellem sukker fra det ene nukleotid og fosfat fra det andet, hvilket resulterer i en alternerende sukker-fosfat-rygrad.