Lipids MCQ Quiz | Biomolecules

Welcome to the Lipids MCQ Quiz, designed specifically for MBBS students to test and reinforce their understanding of this crucial biomolecule. This quiz covers a wide range of topics, including the structure and function of fatty acids, triglycerides, phospholipids, cholesterol, and lipoproteins. It also delves into the metabolic pathways of lipid synthesis and degradation, such as beta-oxidation and fatty acid synthesis, along with their clinical significance in conditions like atherosclerosis and hypercholesterolemia. After submitting your answers, you will receive your score and see the correct responses highlighted. For your revision, you can download a PDF document containing all 25 questions along with their correct answers by clicking the download button that appears after you submit the quiz.

1. Which of the following statements best defines a saturated fatty acid?

2. Which of the following is an essential fatty acid in humans?

3. What is the primary function of triglycerides in the body?

4. The amphipathic nature of phospholipids is crucial for their role in:

5. Cholesterol is the metabolic precursor for all of the following EXCEPT:

6. Which of the following lipoproteins has the highest density?

7. What is the primary function of chylomicrons?

8. VLDL (Very Low-Density Lipoprotein) particles are synthesized primarily in the:

9. Elevated levels of which lipoprotein are most strongly associated with an increased risk of atherosclerosis?

10. The primary physiological role of HDL (High-Density Lipoprotein) is:

11. Where does the beta-oxidation of long-chain fatty acids primarily occur within the cell?

12. The production of ketone bodies (ketogenesis) is significantly increased during:

13. Which enzyme is primarily responsible for the digestion of dietary triglycerides in the small intestine?

14. The primary role of bile salts in lipid digestion is to:

15. Prostaglandins, thromboxanes, and leukotrienes are biologically active lipids collectively known as:

16. Which polyunsaturated fatty acid serves as the primary precursor for the synthesis of prostaglandins?

17. Statin drugs lower serum cholesterol levels by competitively inhibiting which key enzyme in cholesterol synthesis?

18. Familial hypercholesterolemia, a genetic disorder causing severe hypercholesterolemia, is most commonly caused by a defect in the:

19. Sphingomyelin is a type of sphingolipid found abundantly in the:

20. Tay-Sachs disease is a lysosomal storage disease resulting from a deficiency in an enzyme that degrades:

21. The rate-limiting and committed step in fatty acid synthesis is catalyzed by:

22. What is the primary function of the carnitine shuttle system?

23. Which of the following is the most abundant phospholipid in most eukaryotic cell membranes?

24. Infant respiratory distress syndrome (IRDS) is caused by a deficiency in the synthesis of which specific lung surfactant component?

25. Which of the following fatty acids is classified as an omega-3 fatty acid?