A gene that produces multiple effects is called
a. a multiple allele.
b. an autosome.
c. an epistatic gene.
d. a pleiotropic gene.
e. an incompletely dominant gene.
Answer: d
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Study the life cycle diagram. Label B is the ________ life cycle.
A. lysogenic B. lytic C. sexual D. alternation of generations
Each cell is able to maintain an internal environment within a range that favors survival. This condition is called ___________.
A. metabolism B. homeostasis C. physiology D. adaptation E. evolution
In an experiment, the control group is __________.
A. not subjected to experimental error B. exposed to experimental treatments C. maintained under strict laboratory conditions D. treated exactly the same as the experimental group, except for one variable E. statistically the most important part of the experiment
When both lactose and glucose are available to E. coli, which part of the lac operon regulation assures that glucose will be metabolized first?
A) RNA polymerase transcribes the lac operon to make a single RNA molecule. B) The repressor binds to the operator in the absence of lactose. C) The repressor cannot bind to the operator in the presence of lactose. D) Permease allows lactose to enter the cell when lactose enters the cell. E) CAP binds to cAMP and then to the promoter only in the presence of low glucose.