Deoxyribose Glucose Guanine Phosphate Ribose
Molecule 1 X X
Molecule 2 X X X
Molecule 3 X X X
Molecule 4 X X


A scientist is purifying DNA from a bacterium. During the purification process, a preparation is obtained that contains only four molecules. Some components of these molecules are listed in this table. Which of the four molecules is the DNA?

A) molecule 1

B) molecule 2

C) molecule 3

D) molecule 4