Question

Which of the following correctly describes what the parts of the DNA molecule are made of? (Select all that apply.)

a)rungs—a phosphate group and a sugar
b)backbone—bases
c)backbone—a phosphate group and a sugar
d)rungs—bases

Answer 1

Correct answer: c) Backbone—a phosphate group and a sugar

d) Rungs—bases

The DNA molecule is made up of a molecule called as a nucleotide. It consists of a Phosphate group, nitrogenous base, and a sugar group.

Each nucleotide molecule contains the four nitrogenous bases called as guanine [G], cytosine [C], adenine [A] and thymine [T], the pentose sugar and a phosphate group.

The rungs of the DNA strand are made up of nitrogenous bases and backbone of the DNA strand are composed of sugar and phosphate group.