An enzyme catalyses conversion of substrate S to product P. Without inhibitor, Vmax is 120 μmol/min and the Michaelis constant is 4 mmol/L. In the presence of inhibitor X, Vmax remains 120 μmol/min but the apparent Michaelis constant increases to 16 mmol/L. Which mechanism best describes inhibitor X?
More from Biomedical Science
See allA 23-year-old man has recurrent episodes of muscle cramps during intense exercise. During an episode, plasma lactate rises from 1.2 to 1.5 mmol/L (reference 0.5…
A 54-year-old woman has progressive exertional dyspnoea. Spirometry shows a forced expiratory volume in one second of 2.4 L (reference greater than 2.0 L) and a…
A laboratory technician is found unconscious in a poorly ventilated garage. Arterial blood shows pH 7.39, PaO2 13.0 kPa (reference 10.7–13.3 kPa), and PaCO2 5.1…
A 68-year-old man develops sudden pleuritic chest pain and tachypnoea after prolonged immobility. Arterial blood gas analysis on room air shows pH 7.48, PaCO2 3…
A patient with profuse watery diarrhoea caused by enterotoxin receives an oral solution containing sodium and glucose. Before treatment, stool output is high an…