Biologists use ball-and-stick models to study complex molecules by representing atoms with balls and bonds with sticks. DNA is a biological molecule that contains millions of atoms. What is a limitation of using a ball-and-stick model to represent a complete DNA molecule?
Answer
A
Some kinds of atoms that are found in DNA must be left out of the models.
B
DNA has so many atoms that the size and cost of a model could be too great.
C
It is impossible to distinguish different kinds of atoms with models.
D
The chemical bonds between the atoms in DNA must be part of the models.