The lac operon is shown in the accompanying figure.Answer the following question after reviewing the figure.The lac operon is usually in the ______ position and is activated by ______. 
Definitions:
Non-curable Disease
A medical condition or illness that cannot be fully cured or eradicated, though its symptoms may be managed or palliated.
Personality Style
The distinct array of actions, thoughts, and feelings that develop from genetic and environmental influences.
Facets
Aspects or phases that constitute or characterize a complex entity like a personality or a diamond's surface.
Type A Personality
A personality type characterized by high levels of competitiveness, self-imposed stress, impatience, and a constant sense of urgency.
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