Quiz on Protein Structure and Function

What are proteins primarily composed of?

• Polypeptides

• Nucleotides

• Sugars

• Lipids

Which amino acid structure is characterized by chirality?

• Peptide bond

• Cα carbon

• Hydrophobic side chains

• Hydrophilic side chains

What is the primary structure of a protein?

• Three-dimensional folding

• Interaction between multiple polypeptides

• Linear sequence of amino acids

• Localized hydrogen bonding

Which type of bond is primarily responsible for stabilizing secondary structures?

• Hydrogen bonds

• Ionic bonds

• Disulfide bonds

• Covalent bonds

What does the Ramachandran plot illustrate?

• Protein folding pathways

• Protein synthesis

• Allowed φ and ψ angles

• Amino acid solubility

What is the tertiary structure of a protein?

• The arrangement of secondary structures

• The interaction between multiple proteins

• The overall three-dimensional shape

• The sequence of amino acids

Which of the following is a characteristic of quaternary structure?

• Single polypeptide chain

• Linear arrangement

• Multiple polypeptide chains

• Only hydrogen bonding

What is the role of chaperone proteins?

• To transport proteins

• To break down proteins

• To assist in protein folding

• To synthesize amino acids

Which amino acid side chains are hydrophobic?

• Only charged

• Both polar and nonpolar

• Nonpolar and uncharged

• Polar and charged

How many different protein folds are estimated to exist in nature?

• Around 30,000

• Around 1000

• Around 10,000

• Around 100