Exposing E. coli to calcium ions and DNA, then incubating the culture at low temperatures followed by heat shocking
induces ____.
a. artificial transformation
b. a double crossover
c. a single crossover
d. DNA replication
e. infection
ANSWER: a
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To a person studying utilization of classroom
space on campus, the most useful data concerning students in a classroom would be expressed by the number of
a. total individuals. b. individuals per square meter. c. individuals per room. d. rooms per building. e. students of each age
Which aspect of sensory transduction relates to the stimulus strength?
a. action potential frequency b. action potential size c. the neural pathway followed d. receptive field size e. the brain region stimulated
Members of this group of protozoa are decomposers responsible for these infectious diseases: giardiasis (gastroenteritis), trichomoniasis (sexually transmitted disease), and trypanosomiasis (sleeping sickness—Trypanosoma gambiense).
A. flagellated protozoa B. sarcodina C. ciliates D. All of these answers are correct.
Which statement concerning feedback inhibition is false?
A.) feedback inhibition is difficult to reverse B.) feedback inhibition can work almost instantaneously C.) feedback inhibition regulated the flow through biosynthetic pathways D.) feedback inhibition is a feedback system for controlling enzyme activity E.) in feedback inhibition, an enzyme acting early in a reaction pathway is inhibited by a later product of that pathway