Question

r - group (side chain)
select the true statements.
amino acids have carbon, hydrogen, oxygen, and nitrogen atoms.
all proteins are made from the same amino acid.
amino acids are monomers.
each amino acid has a unique r - group.

Explanation:

• Amino acids have a general formula \(NH_2 - CH(R)-COOH\), so they contain carbon (\(C\)), hydrogen (\(H\)), oxygen (\(O\)), and nitrogen (\(N\)) atoms.
• Proteins are made from 20 different amino acids, not the same one.
• Amino acids are monomers that polymerize to form proteins (polymers).
• The \(R -\)group (side - chain) is what makes each amino acid unique.

Answer:

• Amino acids have carbon, hydrogen, oxygen, and nitrogen atoms.
• Amino acids are monomers.
• Each amino acid has a unique R - group.