Question

the models show the chemical structures of an amino acid and a nucleotide. complete the table to compare these structures. is a building block of dna contains nitrogen has an amino group

Explanation:

• Is a building block of DNA: DNA is made up of nucleotides. Amino acids are the building blocks of proteins, not DNA.
• Contains nitrogen: Both amino acids (as seen from the -NH₂ group in the amino acid structure) and nucleotides (as seen from the nitrogen - containing bases in the nucleotide structure) contain nitrogen.
• Has an amino group: Amino acids have an amino (-NH₂) group. Nucleotides do not have an amino group in their general structure (the nitrogen in nucleotides is part of nitrogenous bases, not in an amino - group like -NH₂).

Answer:

	Amino acid	Nucleotide
Contains nitrogen	✔️	✔️
Has an amino group	✔️