NEET MDS Quiz - Practice Test

1

General Medicine

What is the primary mechanism by which H. pylori is able to survive in the acidic environment of the stomach?
1) It produces hydrochloric acid
2) It has a protective outer coating
3) It produces urease, which generates ammonia
4) It lives in the mucus layer without contacting the acid

Option 1

Option 2

Option 3

Option 4

📝 Explanation:

H. pylori produces the enzyme urease, which breaks down urea into ammonia and carbon dioxide, raising the local pH around the bacteria and protecting them from the acidic gastric environment.

2

General Medicine

A 50-year-old male with a history of type 2 diabetes mellitus presents with sudden onset of severe, painful, and reddened skin on the dorsum of his foot. His blood glucose is 350 mg/dL. Which of the following is the most likely diagnosis?
1) Cellulitis
2) Diabetic neuropathic ulcer
3) Pyoderma gangrenosum
4) Erythema multiforme

Option 1

Option 2

Option 3

Option 4

📝 Explanation:

The sudden onset of pain, redness, and swelling of the skin, particularly in a patient with poorly controlled diabetes, suggests a bacterial infection such as cellulitis.

3

General Medicine

What is the primary target organ of toxicity in Wilson�s disease?
1) Liver
2) Pancreas
3) Brain
4) Kidneys

Option 1

Option 2

Option 3

Option 4

📝 Explanation:

In the brain, Wilson�s disease primarily affects the basal ganglia, particularly the putamen, leading to the neurological symptoms mentioned earlier. While the liver and kidneys can also be involved, the central nervous system is the primary target organ for toxicity.

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