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NEET MDS Quiz - Practice Test
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Practice Test

General Medicine - 3 Questions

1
General Medicine

Which of the following is the most common cause of primary hyperparathyroidism?
1) Parathyroid adenoma
2) Parathyroid carcinoma
3) Multiple endocrine neoplasia type 1 (MEN 1)
4) Secondary hyperparathyroidism due to chronic renal failure

📝 Explanation:

Primary hyperparathyroidism is most commonly caused by a single parathyroid adenoma, leading to excessive secretion of parathyroid hormone and increased serum calcium levels.

2
General Medicine

What is the role of antithrombin III in the coagulation process?
1) Activates thrombin
2) Inhibits thrombin
3) Stabilizes fibrin clots
4) Activates factor X

📝 Explanation:

Antithrombin III is a serine protease inhibitor that plays a critical role in regulating blood coagulation by inhibiting thrombin (factor IIa) and other serine proteases in the coagulation cascade. This helps maintain the delicate balance between clot formation and dissolution.

3
General Medicine

What is the primary mechanism of action of Shiga-like toxins produced by EHEC?
1) Inhibits protein synthesis by binding to ribosomes
2) Induces lipid peroxidation in cell membranes
3) Increases intracellular cAMP
4) Induces endothelial cell damage

📝 Explanation:

Shiga-like toxins produced by EHEC bind to ribosomes in target cells, particularly endothelial cells, and inhibit protein synthesis. This leads to cell damage and contributes to the development of hemolytic uremic syndrome.

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