Protein Structure Quiz

What is the primary structure of a protein?

• The unique order of amino acids in a protein

• The coiling or folding of a polypeptide chain

• The complex globular shape of a protein

• The structure formed by interactions between multiple polypeptide chains

Which type of structure is formed by hydrogen bonds between every fourth amino acid?

• Alpha (α) helix structure

• Beta (β) pleated sheets

• Tertiary structure

• Quaternary structure

What type of structure is observed in proteins that have two or more segments lying side by side and connected by hydrogen bonds?

• Alpha (α) helix structure

• Beta (β) pleated sheets

• Tertiary structure

• Quaternary structure

Which type of structure results in a complex globular shape due to interactions between side chains of amino acids?

• Alpha (α) helix structure

• Beta (β) pleated sheets

• Tertiary structure

• Quaternary structure

What is the fourth level of protein structure that arises when a protein consists of two or more polypeptide chains?

• Primary structure

• Secondary structure

• Tertiary structure

• Quaternary structure

What are motifs in protein structure?

• Functional units within a larger structure

• Super secondary structures formed by elements of secondary structure

• Proteins that help other proteins to fold correctly

• Structures formed by interactions between multiple polypeptide chains

What are domains in protein structure?

• Functional units within a larger structure

• Super secondary structures formed by elements of secondary structure

• Proteins that help other proteins to fold correctly

• Structures formed by interactions between multiple polypeptide chains

What do chaperone proteins do?

• Help other proteins to fold correctly

• Form super secondary structures

• Bind to the DNA double helix

• Perform different parts of a protein's function

What can result from improper folding of chaperone proteins?

• Thicker mucus and breathing problems

• Lung disease and digestive difficulties

• Cystic fibrosis

• All of the above

Which protein is made of four identical polypeptides and transports vitamin A and one of the thyroid hormones throughout the body?

• Collagen

• Hemoglobin

• Transthyretin

• Silk fibers