Question

The lac operon is under positive control, a phenomenon called _________________

• A. regulation
• B. mutation
• C. lactose-effect
• D. glucose-effect

Answer 1

Answer:

D. glucose-effect

• The lac operon is negatively regulated by repressor proteins.

• There is also a positive control that prevails in the lac operon, called the glucose-effect.

• When glucose is present in the medium along with other substrates, the catabolism of the letter is suppressed.