When the intracellular level of lactose drops, the repressor protein binds to the operator and shuts
down translation.
__________________ Indicate whether the statement is true or false.
F, transcription
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While eating lobster for dinner one night your friend asks what you think might happen if this marine invertebrate, which is normally isosmotic with respect to the surrounding seawater, were to be moved to a bay with a slightly lower salt concentration instead of being caught. You reply that, in order for the lobster to be isosmotic with respect to new environment,
A. it must move water in to match the solute concentration of its new environment. B. it regulates its internal concentration of solutes to match that of its new environment. C. it must move water out to match the solute concentration of its new environment. D. it moves water in or out and regulates its internal concentration of water as needed.
Treatment of HIV attempts to
A. block reverse transcriptase activity. B. block attachment to host cells. C. block viral integrase. D. block viral protease activity. E. All of the above
Some deer mice are physiologically adapted to live at high altitudes because of the following:
a. adults maintain fetal forms of hemoglobin. b. mutations in hemoglobin that increase its oxygen-binding affinity. c. mutations in myoglobin that increase its oxygen-binding affinity. d. mutations that increase heart rates. e. mutations that decrease heart rates.
The closed end of a nephron forms a cup-like structure called a Bowman's capsule or a ______?
Fill in the blank(s) with correct word