You are working with a gene associated with an essential pathway that is necessary at two time points in an organism's lifetime. With regard to gene regulation, you would expect the gene to be
A) not constitutive.
B) associated with response to distinct events.
C) "activated" by particular signals (induced).
D) "turned off" by particular signals (repressed).
E) all of the above
E) all of the above
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Integration of linear transforming DNA into the chromosome
A) is not required for the expression for the transformed genes. B) is catalyzed by the RecA gene. C) almost never occurs because restriction endonuclease will degrade the DNA before it is integrated. D) only occurs in laboratory-based systems in artificial competent cells.
Lyme disease is a bacterial disease that is transmitted to humans when a black-legged tick that
is infected with the bacterium bites and feeds on a human. In this scenario, the tick is an example of a __________.
a. cyst b. vector c. primary host d. pathogen
The fact that genes associated with altruism are favored by natural selection if they lead to the reproductive success of
an altruist’s closest relatives is called _____. a. the theory of inclusive fitness b. survival of the fittest
c. evolution d. inbreeding e. selective mating
the hydrophobic tails form the
What will be an ideal response?