Biochemistry Quiz: Lipid Metabolism

What is the primary site for ketogenesis?

• Liver mitochondria

• Adipose tissue

• Muscle cells

• Pancreas

Which ketone body is produced first in the process of ketogenesis?

• Acetoacetate

• β-hydroxybutyrate

• Acetone

• Oxaloacetate

What is the main function of adipose tissue?

• Storage location for energy

• Insulation

• Protection against physical shock

• All of the above

What is the major enzyme involved in the hydrolysis of triacylglycerols in the small intestine?

• Gastric lipase

• Pancreatic lipases

• Hormone-sensitive lipase

• Lipoprotein lipase

Which of the following is NOT a health risk associated with excess fat located in the central abdominal area?

• Hypertension

• Insulin resistance

• Diabetes

• Arthritis

What is the primary source of stored energy in the human body?

• Protein reserves

• Glycogen reserves

• Glucose reserves

• Triacylglycerol reserves

How many ATP molecules are produced from the oxidation of stearic acid, an 18-carbon fatty acid?

• 120 ATP

• 122 ATP

• 124 ATP

• 126 ATP

What is the function of micelles in lipid digestion and absorption?

• To transport fatty acids and monoacylglycerols across the intestinal cell membranes

• To emulsify triacylglycerol globules

• To convert triacylglycerols into chylomicrons

• To hydrolyze ester linkages in triacylglycerols

Which of the following is NOT a ketone body?

• Acetoacetate

• β-hydroxybutyrate

• Acetone

• Glycerol

What is the purpose of the shuttle mechanism in fatty acid transport into the mitochondrial matrix?

• To convert fatty acids into acetyl CoA

• To convert acyl CoA into acetyl CoA

• To convert acetyl CoA into acyl CoA

• To convert acyl CoA into ketone bodies