QUIZ 2

What is the primary function of proteins in the body?

• Provide immediate energy

• Act as a buffer for blood pH

• Repair tissues and transport metabolic substances

• Store genetic information

Which of the following best describes proteins?

• Macromolecules composed of covalently linked amino acids

• Simple carbohydrates that provide energy

• Composed of fatty acids and glycerol

• Chains of nucleotides that store genetic information

What percentage of the total daily body energy requirement is provided by proteins?

• 5-10%

• 12-20%

• 30-40%

• 50-60%

Which protein structure determines the protein’s function and binding capacity?

• Primary structure

• Secondary structure

• Tertiary structure

• Quaternary structure

What type of protein structure is characterized by α-helices and β-pleated sheets?

• Primary

• Secondary

• Tertiary

• Quaternary

Which of the following is an example of a simple protein?

• Glycoprotein

• Metalloprotein

• Albumin

• Lipoprotein

Conjugated proteins are composed of:

• Peptide chains that hydrolyze to yield only amino acids

• A protein (apoprotein) and a non-protein moiety

• Carbohydrates and lipids only

• Nucleic acids and peptides

What is the function of metalloproteins?

• Transport lipids in the blood

• Store and transport metal ions

• Act as antibodies in the immune response

• Provide structural support to cells

Which of the following is an example of a mucoprotein?

• Hemoglobin

• Transferrin

• Albumin

• Proteoglycans

Which protein is a major transport protein in the blood?

• Immunoglobulin

• Albumin

• Hemoglobin

• Myoglobin