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GAL1 is a controllable promoter and is obtained from genes for galactose metabolism. It is known for encoding ______

(a) UDP-galactose-4-empirase

(b) Galactokinase

(c) Both UDP-galactose-4-empirase and galactokinase

(d) Glucokinase

This question was addressed to me during an online interview.

I need to ask this question from YAC and Expression Systems topic in section Using Other Organisms of Genetic Engineering

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Correct choice is (b) Galactokinase

Easiest explanation: GAL1 is a controllable promoter and is obtained from genes for galactose metabolism. It encodes for galactokinase and GAL10 encodes for UDP-galactose-4-empirase.

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