Biology Mock Paper Dse Apr 2026

She didn’t need to revise for this one. She thought of the news, the arguments online, the herd immunity threshold falling apart. She wrote:

“In a long-term study, a population of bacteria was exposed to a sub-lethal dose of an antibiotic. After 50 generations, the minimum inhibitory concentration (MIC) had increased 1000x. Using the theory of natural selection, explain how this occurred. (8 marks) Bonus: Provide a real-world implication beyond the lab.”

Easy. She drew the diagram: High blood glucose → Pancreas detects → More insulin → Liver stores glycogen → Glucose drops. Perfect. biology mock paper dse

She paused. The pen trembled in her hand. Her own words stared back at her: Untreatable infections. Her grandmother was in the hospital right now. A routine surgery had gone wrong because of a resistant E. coli infection.

She turned the page.

Outside, the sun broke through the fog. She took out her phone. One new message from her mother: “Grandma’s fever broke. The antibiotics finally worked.”

Here’s a short story based on the theme of a , blending the pressure of the exam with a narrative about the very science being tested. Title: The Last Question She didn’t need to revise for this one

But her grandmother’s face flashed in her mind. The ventilator. The resistant bacteria. The doctors fighting to bring her body back to balance.

Megan smiled. For the first time all year, she wasn't afraid of the DSE. She drew the diagram: High blood glucose →