The amount of an enzyme that will catalyze the reaction of 1 micromole of substrate in 1 minute defines what unit of activity?

The enzyme unit

Explanation:

Enzymes are catalyst, meaning that they make chemical reactions faster.

For measuring the catalytic activity of an enzyme there are two common units The enzyme unit and The Katal.

The first one is defined as the amount of enzyme that catalyzes the reaction of 1 micromole of substrate in a minute, on the other hand the katal is give for 1 mole per second. Since 1 mol is a huge amount in terms of enzymes, it is usually use the prefix nano- (10^-9).

1 U = 16.67 nKat if you need a conversion factor.

Hope it helps!