The International Unit (I.U.) for enzyme activity is that amount of enzyme which at 30⁰ C will convert substrate to product at a rate of A) 1 micromole/min. B) 1 micromole/sec. C) 1 millimole/min. D) 1 millimole/sec. E) 1 nmole/sec.

Question

Quizplus · Accepted Answer

The definition of the International Unit implies that it refers to the enzyme activity at a specific temperature (30°C) and the rate of conversion of the substrate to the product is given in micromoles per minute. Therefore, the correct choice would be option A) 1 micromole/min.