Question

protein structure
proteins are made up of monomers called amino acids. when the amino acids come together, they form peptide bonds. therefore, another term for proteins is polypeptide (many peptide bonds).
the sequence of amino acids that form a protein is referred to as a protein’s primary structure. primary structure is the most basic way one can analyze the function of a protein. the primary structure of a protein is characterized by special bonds known as peptide bonds. the peptide bonds link each individual amino acid to the next amino acid in the sequence. because of these special peptide bonds, proteins are also referred to as polypeptides. proteins are a structure held together by many (hence poly-) peptide bonds.

1. what are amino acids?
2. why do we call proteins polypeptides?

primary protein structure
is sequence of a chain of amino acids
amino acids
amino group
nh₂
h—c—cooh
acidic
carboxyl
r group
amino acid
phe
leu
ser
cys

Explanation:

Question 2:

From the text, amino acids are the monomers (building blocks) that make up proteins. The diagram also shows an amino acid's structure with an amino group ($NH_2$), a carboxyl group ($COOH$), a hydrogen atom, and an R group, and they link via peptide bonds to form proteins.

The text states proteins are called polypeptides because they are made of many (poly -) amino acids linked by peptide bonds (hence polypeptide, as "poly -" means many and "peptide" refers to the bonds between amino acids).

Answer:

Amino acids are the monomers (building blocks) of proteins. Structurally, an amino acid has an amino group ($NH_2$), a carboxyl group ($COOH$), a hydrogen atom, and a unique R group, and they form peptide bonds to build protein chains.

Question 3: