Nucleotides are linked to make up DNA. Amino acids are linked to make up DNA. Proteins are linked to make up nucleotides. Nucleic acids are linked to make up proteins.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In living things, smaller substances are linked to make up larger substances. Which of the following correctly describes a larger substance made by linking smaller substances?
Possibilities:
- Nucleotides are linked to make up DNA.
- Amino acids are linked to make up DNA.
- Proteins are linked to make up nucleotides.
- Nucleic acids are linked to make up proteins.

Nucleotides are linked to make up DNA.