Science Assessment

Which of the following statements is TRUE about the brain cells, skin cells, and DNA molecules in an individual human?

1. The brain cells contain DNA molecules, but the skin cells do not.
2. The skin cells contain DNA molecules, but the brain cells do not.
3. The brain cells and skin cells both contain DNA molecules, and their DNA molecules contain the same genetic information.
4. The brain cells and skin cells both contain DNA molecules, but their DNA molecules contain different genetic information.