The correct answer is:
C. Nucleotides are small molecules that make up for larger molecules of DNA.
To clarify:
- A is incorrect because DNA is a larger molecule made up of nucleotides, not the other way around.
- B is incorrect because nucleotides are the building blocks of DNA.
- D is incorrect because not all statements are true; specifically, A and B are false.
So, C is the only true statement.