IB Biology Exam Prep

Correct Response: A. Peptic ulcers are lesions that form in the lining of the stomach. The most common cause of peptic ulcers is the bacterium Helicobacter pylori. Although excess alcohol consumption and frequent use of some pain medications can also increase the likelihood of ulcers, spicy food (B), viral eruption (C), and use of antacids, which help neutralize gastric acid, (D) do not contribute significantly to ulcer formation.