She read the stem: A 45-year-old male, Mr. Chan, has a fasting blood glucose of 13.2 mmol/L. Explain the negative feedback mechanism that is failing in his body. (6 marks)
Megan flew through Section A. Enzyme inhibition? Competitive. Kidney dialysis? Diffusion and osmosis. She felt the familiar click of facts locking into place. Question after question, she drew the nephron, labelled the loop of Henle, and calculated the water potential of a potato cell. biology mock paper dse
She wrote the textbook answer: Random mutation → Some bacteria have resistance gene → Sub-lethal dose kills non-resistant → Resistant bacteria survive and reproduce → Allele frequency increases. She read the stem: A 45-year-old male, Mr