Protein Structure and Function Quiz

What is the central carbon in an amino acid called?

• Carboxyl group

• Amino group

• α (alpha) carbon

• R group

Which functional group in an amino acid consists of a nitrogen atom bonded to two hydrogen atoms?

• Carboxyl group

• Amino group

• R group

• Peptide bond

Which functional group in an amino acid consists of a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group?

• Carboxyl group

• Amino group

• α (alpha) carbon

• R group

Tags

NGSS.HS-LS1-6

Which part of an amino acid determines its unique characteristics?

• Carboxyl group

• Amino group

• α (alpha) carbon

• R group (or side chain)

What type of bond links amino acids together in a polypeptide?

• Hydrogen bond

• Ionic bond

• Peptide bond

• Disulfide bond

What is the end of a polypeptide chain with a free amino group called?

• Carboxyl end

• Amino end

• Peptide end

• R group end

What is the end of a polypeptide chain with a free carboxyl group called?

• Carboxyl end

• Amino end

• Peptide end

• R group end

What term describes the linear sequence of amino acids in a protein?

• Secondary structure

• Tertiary structure

• Primary structure

• Quaternary structure

Which level of protein structure involves the folding of the polypeptide chain into α (alpha) helices and β (beta) sheets?

• Primary structure

• Secondary structure

• Tertiary structure

• Quaternary structure

Which level of protein structure refers to the overall three-dimensional shape of a single polypeptide chain?

• Primary structure

• Secondary structure

• Tertiary structure

• Quaternary structure