Question

Urease enzyme catalyzes the conversion of urea into ammonia and carbon dioxide. Which one of the following organisms expresses urease enzyme?

• A. ( Caenorhabditis elegans )
• B. ( Drosophila melanogaster )
• C. ( Helicobacter pylori )
• D. ( Homo sapiens )

Hint:

The presence of urease is a diagnostic marker for Helicobacter pylori infection, often detected through breath tests in clinical settings.

Answer 1

The Correct Option is C

The urease enzyme is crucial for certain bacteria to survive in acidic environments by catalyzing the conversion of urea into ammonia, which can neutralize acid. Analysis of Each Option: (A) Incorrect: Caenorhabditis elegans, a nematode, does not utilize urease as part of its metabolic processes. (B) Incorrect: Drosophila melanogaster, commonly known as the fruit fly, does not produce urease. (C) Correct: Helicobacter pylori expresses urease, which is a critical factor in its ability to colonize the human stomach, neutralizing stomach acid through the production of ammonia. (D) Incorrect: Humans (Homo sapiens) do not produce urease. The presence of urease in humans is typically associated with bacterial infection. Conclusion:
Explanation: Helicobacter pylori's expression of urease is a well-documented mechanism that helps protect the bacteria from the acidic environment of the stomach, enabling it to cause infections that can lead to ulcers and other gastrointestinal disorders.