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The inducer for switching ‘on’ the lac operon in bacteria is
Option: 1
presence of lactose
Option: 2
number of bacteria
Option: 3
presence of structural genes in the bacteria
Option: 4
presence of sucrose
Answers (1)
As discussed in Lac Operon -
Lactose is the substrate for the enzyme beta-galactosidase and it regulates switching on and off of the lac operon. Also, it is termed as an inducer. Hence, the correct option is (a).
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