76. Helicobacter pylori survives in the acidic environment of the stomach because it:
1. has acid resistant cell wall
2. releases alkaline compounds
3. produces urease enzyme
4. uses acid as a nutrient

Detailed Explanation:

Helicobacter pylori is a bacterium that can survive in the highly acidic environment of the stomach. One of its key mechanisms for this survival is the production of urease enzyme. Urease breaks down urea, present in the stomach, into ammonia and carbon dioxide. The ammonia is alkaline, which helps neutralize the acid in the stomach, allowing the bacterium to thrive in an environment where most other organisms would not survive.

Thus, the correct answer is:
3. produces urease enzyme