Understanding Proteins

What are the building blocks of polypeptide chains?

• Nucleotides

• Amino acids

• Monosaccharides

• Fatty acids

Which of the following is a structural function of proteins?

• Defending against pathogens

• Transporting oxygen

• Forming cell membranes

• Speeding up reactions

What role do enzymes play in the body?

• They catalyze chemical reactions

• They provide structural support

• They store genetic information

• They transport nutrients

Which protein is responsible for transporting oxygen in the blood?

• Insulin

• Hemoglobin

• Antibodies

• Collagen

How do antibodies function in the body?

• They provide structural support

• They transport oxygen

• They catalyze reactions

• They defend against pathogens

Why is the 3D structure of a protein critical?

• It changes the protein's weight

• It determines the protein's color

• It affects the protein's ability to function

• It influences the protein's size

What happens if a receptor protein does not have the correct shape?

• It will become an enzyme

• It will not be able to bind to its hormone

• It will transport oxygen

• It will change its function

What determines the primary structure of a protein?

• The number of polypeptide chains

• The protein's function

• The sequence of amino acids

• The protein's 3D shape

Which level of protein structure involves the overall 3D shape of a single polypeptide chain?

• Primary

• Secondary

• Quaternary

• Tertiary

What is an example of a protein with a quaternary structure?

• Insulin

• Hemoglobin

• Collagen

• Keratin