The chemical reaction for the Ortho-nitrophenyl-b-D-galactopyranoside (ONPG) test is:
A) b-galactosidase hydrolyzes lactose into glucose and galactose.
B) glucose ® pyruvic acid ® acetoin.
C) b-galactosidase hydrolyzes o-nitrophenyl-b-D-galactopyranoside into galactose and o-nitrophenol (a yellow compound) .
D) O-nitrophenyl-b-D-galactopyranoside is oxidized into acetoin and glucose.
Correct Answer:
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