Biology IA Exemplar: How do different concentrations of inhibitory tannic acid (0% (control), 0.1%, 0.2%, 0.3%, 0.4%, 0.5%) affect the starch breakdown catalyzed by 1% α-amylase in 1% starch solution, as measured by changes in absorbance (±0.1 Au) at 540nm using a spectrophotometer, after 10 minutes (600 ±0.01 s) of enzymatic reaction and dinitro-salicylic acid (DNS) addition to test for the presence of sugars at the end of the reaction? | RevisionDojo