Homework Answers
Answer=A
Explanation-
Lac IN has mutation,it can't bind to operator so Permease (Y) gives expression in both types of condition (lactose absent and lactose present).
b-gal(Z) gene makes no functional protein in both types of condition (Lactose absent and lactose present) so it gives no expression in both types of condition (lactose absent and lactose present).
So option A is correct answer rest all the options are incorrect.
Option B,C and E are incorrect because b-gal(Z) gives expression but in given condition b-gal(Z) gene is mutatet so b-gal(Z) gives no expression.
Option D are incorrect because it show no expression but Permease show expression in both condition so this is incorrect.
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different components of the lac operon. Determine if β-gal will be
generated under the conditions. Assume that glucose is absent. A +
in the genotype indicates a functioning gene, while a – indicates a
loss-of-function allele. The OC is an operator mutant that cannot
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