BI4.1-8 | Chemistry and Metabolism of Lipids — Practice Quiz

Which class of lipids serves as the primary energy storage form in the human body?

Which of the following fatty acids is classified as an essential fatty acid that must be obtained from the diet?

CPT-I (carnitine palmitoyltransferase I) is the rate-limiting step of beta-oxidation. Which molecule inhibits CPT-I, thereby preventing fatty acid oxidation when synthesis is active?

Acetyl-CoA carboxylase (ACC) catalyses the rate-limiting step of fatty acid synthesis. Which vitamin is required as a cofactor for this enzyme?

A 2-year-old child presents with altered sensorium after a 14-hour fast. Blood glucose is 35 mg/dL and urine ketones are NEGATIVE. Which enzyme deficiency is the most likely diagnosis?

HMG-CoA reductase catalyses the rate-limiting step of cholesterol biosynthesis. Which drug class inhibits this enzyme to lower blood cholesterol?

Which lipoprotein is responsible for 'reverse cholesterol transport' — carrying excess cholesterol from peripheral tissues back to the liver?

A premature neonate develops respiratory distress syndrome (RDS) due to deficiency of pulmonary surfactant. The major phospholipid component of surfactant is:

A 42-year-old man presents with an LDL of 210 mg/dL and triglycerides of 380 mg/dL. He is started on atorvastatin. By which mechanism does atorvastatin primarily reduce blood LDL levels?

A patient's fasting lipid profile shows: Total cholesterol 250 mg/dL, LDL 170 mg/dL, HDL 32 mg/dL, Triglycerides 450 mg/dL. The serum appears milky (lipaemic). Which lipoprotein is most likely elevated to cause the milky appearance?