Q.
Lactose is a substrate for
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a
galactosidase
b
α-galactosidase
c
β-galactosidase
d
γ-galactosidase
answer is C.
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Detailed Solution
Lactose is the substrate for the enzyme beta (β) galactosidase and it regulates the switching on and off of the lac operon. Hence, it is termed as inducer.
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