Question

Histidinol dehydrogenase allows synthesis of histidine from exogenous histanol.

(a) True

(b) False

I got this question in a national level competition.

This is a very interesting question from Cultured Cells in Mammals and Restricted Areas in Intact Organisms topic in section Using Other Organisms of Genetic Engineering

Answer 1

Right option is (a) True

To elaborate: Histidinol dehydrogenase is also used as a selectable marker. It allows synthesis of histdidine from exogenous histanol and protects from toxic effects of histidinol.