A lac I? mutant would

A) express lacZYA constitutively.
B) not induce lacZYA in the presence of lactose.
C) not have ?-galactosidase activity.
D) not transport lactose into the cell effectively.
E) not metabolize lactose.


Answer: A

Biology & Microbiology

You might also like to view...

All of the following are abiotic factors within an ecosystem except ________.

A. fire B. nutrients C. energy D. All of the above are abiotic factors.

Biology & Microbiology

All of the following are true of acute necrotizing ulcerative gingivitis (ANUG) except that it

A. is associated with severe pain, bleeding, pseudomembranes, and necrosis. B. is highly contagious. C. is common in AIDS patients. D. involves Treponema vincentii, Prevotella intermedia, and Fusobacterium. E. is due to poor oral hygiene, altered host defenses, or prior gum disease.

Biology & Microbiology

Males never give an X chromosome to any of their sons

a. True b. False

Biology & Microbiology

A __________ is required to transfer genes from one organism to another

a. vector b. reverse transcriptase c. transport molecule d. genetic probe e. PCR device

Biology & Microbiology