Question

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

Explanation:

Step1: Recall DNA building - blocks

DNA is made up of nucleotides, not amino - acids. So for "Is a building block of DNA", amino acid is no and nucleotide is yes.

Step2: Check for nitrogen presence

Both amino acids and nucleotides contain nitrogen. Amino acids have nitrogen in their amino group ($-NH_2$) and nucleotides have nitrogen in their nitrogenous bases.

Step3: Identify amino - group

Amino acids have an amino group ($-NH_2$), while nucleotides do not have a distinct amino group as a main functional group.

Answer:

	Amino acid	Nucleotide
Contains nitrogen	Yes	Yes
Has an amino group	Yes	No