Concept explainers
(a)
To write: An equation for the urea hydrolysis by urease.
Concept introduction:
Helicobacter pylori are a group of gram-negative bacteria that causes infection in stomach. It can cause peptic and gastric ulcers. H.pylori produces a nickel-containing urease that catalyzes the urea hydrolysis to produce ammonia and carbonic acid.
(b)
To explain: The reason why the given reaction could help establish a more hospitable environment for H. pylori, which tolerates acid but prefers to grow at near-neutral pH.
Concept introduction:
Helicobacter pylori is a group of gram-negative bacteria that causes infection in stomach. It can cause peptic and gastric ulcers. H.pylori produces a nickel-containing urease that catalyzes the urea hydrolysis to produce ammonia and carbonic acid.
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Chapter 21 Solutions
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