This is indicated by the yellow color found in glucose and the orange color found in lactose. Our bacteria does not ferment sucrose. Triple Sugar Iron Agar Test (TSIA): Recall, we used the aseptic technique to inoculate an agar slant containing triple sugar iron agar (consisting of 1% lactose, 1% sucrose, 0.1% glucose). Without the lactase enzyme, lactose cannot be hydrolyzed into its digestible components, glucose and galactose. Ruling out lactose intolerance with a hydrogen breath test is a desirable goal because if no intolerance is present, there is no need to modify lactose intake. Lactose intolerance presents at various thresholds from person to person.
Which of the following best describes why ddt is classified as a persistent organic pollutant_