When the intracellular level of lactose drops, the repressor protein binds to the operator of the lac operon and shuts
down translation of the lac structural genes.
__________________ Indicate whether the statement is true or false.
False - transcription
You might also like to view...
The rough ER is rough because of the presence of
1.proteins. 2.RNA. 3.lipids. 4.ribosomes.
Normal bacterial inhabitants of the human body
a. are naturally resistant to antibiotics. b. are able to out-compete some invading pathogens and thus are one of the body’s initial defense mechanisms. c. can be transformed into pathogenic forms if a person’s resistance to disease is low. d. are unable to survive the human body’s defense mechanisms. e. are able to out-compete some invading pathogens and thus are part of the body’s innate immunity.
When air is no longer moving through the respiratory tract and the airway is open to the environment, the pressure within the lung is equal to
A) end-diastolic pressure. B) transpulmonary pressure. C) atmospheric pressure. D) intrapleural pressure. E) systolic blood pressure.
Toxoplasmosis includes all the following, except
A. ingesting pseudocysts from contaminated raw or undercooked meat. B. intrauterine infectious are generally mild with very little damage to fetal tissues. C. tachyzoites can cross the placenta. D. immunocompromised patients often develop a fatal, disseminated infection. E. ingesting or inhaling oocysts from infected cats or cat feces.