Correct option is A
The correct answer is (a).
The enzyme glucose oxidase is used in commercially available blood glucometers to catalyze the conversion of glucose to gluconolactone. This reaction is crucial for measuring blood glucose levels. Glucose oxidase specifically oxidizes glucose to gluconolactone and hydrogen peroxide, with the latter being detected electrochemically in the glucometer, providing a readout of glucose concentration in the blood sample. This enzyme is preferred because of its high specificity for glucose and its ability to provide accurate measurements in the presence of other substances in the blood.
Incorrect options-
Glucose reductase (option b) is not commonly used in blood glucometers; it catalyzes reduction reactions rather than oxidation of glucose.
Glucose dehydrogenase (option c) is another enzyme used in some glucometers but works differently by using cofactors like NAD or PQQ instead of oxygen. It is less specific than glucose oxidase.
Gluconolactonase (option d) catalyzes the hydrolysis of gluconolactone to gluconic acid but is not involved in the initial glucose oxidation step.
