Under what condition is the AraC protein an activator?
A) The AraC protein is an activator when it is bound to glucose.
B) The AraC protein is an activator when it is bound to lactose.
C) The AraC protein is an activator when it is bound to arabinose.
D) The AraC protein is an activator when it is bound to cyclic AMP.
E) The AraC protein is an activator when it is bound to any sugar molecule.

Question

Quizplus · Accepted Answer

The AraC protein is an activator when it is bound to arabinose. This is because the ara operon, which is regulated by AraC, is involved in the catabolism of arabinose. When arabinose is present, it binds to AraC, causing a conformational change that allows AraC to activate the genes in the ara operon.

Under What Condition Is the AraC Protein an Activator