<prompt> True about enzyme specificity:Amount of enzyme required per second, per mole or product formationNumber of sites per substrateAmount of enzyme binding with various substratesAmount of enzyme causing transformation of 1 mol of substrate per minute under standard condition  <response>: 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 molesecond i.e. conservation of 1 moles of substrate per secondEnzymes 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. 