The product of the lacI gene functions most like a car's _____

A) parking brake
B) accelerator pedal
C) steering wheel
D) engine
E) gear shift


Answer: A

Biology & Microbiology

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Anaphylaxis is the name given to allergic reactions caused by IgE-mediated release of mast cell granules

Indicate whether this statement is true or false.

Biology & Microbiology

Honeybees must maintain specific temperatures to thrive. On hot days, the hive can quickly

overheat, so some bees will stand near the entrance and fan their wings to provide cool air currents into the hive. In winter, honeybees cluster together in their hives and vibrate their wings in a form of shivering to generate heat and maintain the hive at a constant temperature. This heating and cooling is a form of

a. homeostasis. b. evolution. c. competition. d. homology

Biology & Microbiology

Information from experiments is considered valid if 

A. the same results are obtained each time the experiment is performed. B. the results were predicted by the hypothesis. C. the same results are obtained by several scientists. D. All of these statements are true.

Biology & Microbiology

Which component of the electron-transport chain is required to combine the pair of electrons with molecular oxygen?

(a) cytochrome c (b) cytochrome b-c1 complex (c) ubiquinone (d) cytochrome c oxidase

Biology & Microbiology