What enzyme is necessary to produce a positive “I” test? a….

Whаt enzyme is necessаry tо prоduce а pоsitive “I” test? a. glucose-6-phosphate dehydrogenaseb. hexose kinasec. tryptophanased. tyrosinase [enzyme] Which area of the dry slide (see below) shows a positive ‘I” test? a. top left cornerb. bottom left corner [Indole] Which Simmon’s citrate tube (see below) is positive? a. Tube 1b. Tube 2 [citrate] What must an organism be able to do to produce a positive citrate test? a.  have tryptophanase b.  have catalase c.  have citrase d.  have lactase [positive]