Biochemistry

A 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 7-month-old infant becomes lethargic after an overnight fast during gastroenteritis. Blood glucose is 1.9 mmol/L (reference 3.5–6.0 mmol/L), beta-hydroxybutyr…

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 i…

Which of the following mediators plays a key role in pain sensitization by enhancing nociceptor activity?

Which of the following is the characteristic crystal found in pseudogout?