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Inducible operon system usually occurs in (i)___________ pathways. Nutrient molecules serve as (ii)__________ to stimulate production of the enzymes necessary for their breakdown. Genes for inducible operon are usually switched (iii)__________ and the repressor is synthesised in an (iv)___________ form.
(i) (ii) (iii) (iv)
Anabolic corepressor on inactive
(i) (ii) (iii) (iv)
Anabolic inducer off active
(i) (ii) (iii) (iv)
Catabolic inducer off active
(i) (ii) (iii) (iv)
Catabolic corepressor on inactive
Answers (1)
Inducer -
Lactose is the substrate for the enzyme beta-galactosidase and it regulates switching on and off of the operon. hence it is termed as inducer.
-
Correct option is 3
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