What interaction between the phosphate and the carbohydrate of a nucleotide holds the backbone of a DNA strand together?
A) disulfide bridges
B) covalent bonds
C) van der Waals forces
D) ionic bonds
E) hydrogen bonds

Question

Quizplus · Accepted Answer

The backbone of a DNA strand is held together by covalent bonds between the phosphate group of one nucleotide and the sugar (carbohydrate) of the next nucleotide. These are specifically phosphodiester bonds, a type of covalent bond.

What Interaction Between the Phosphate and the Carbohydrate of a Nucleotide