True about enzyme specificity:

The specific activity of enzyme is usually expressed as p mol of substrate transformed to product per minute per milligram of enzymes under optimal condition of measurement.1 international unit (IU) =1 micromole / minuteModern unit of enzyme activity, 1 katals (kat) =1 mole/second (i.e. conservation of 1 moles of substrate per second)Enzymes are highly specific, interacting with one or few specific substrates & catalyzing only one type of chemical reaction Rate of metabolic processes may thus be regulated by changes in the catalytic efficiency of specific enzymes.