Which test determines if an organism is a delayed lactose-fermenter?
A)b-Galactosidase
B)Dihydroxylase
C)Nitrate
D)Ortho-nitrophenyl-b-D-galactopyranoside (ONPG) test

Question

Quizplus · Accepted Answer

The ONPG test determines whether the organism is a delay lactose-fermenter (one that lacks the enzyme b-galactoside permease but possesses b-galactosidase) or a true nonlactose-fermenter.

Which Test Determines If an Organism Is a Delayed Lactose-Fermenter