What is the term for the loss of genetic variation due to an event that decreases the size of the entire population?
A) gene flow
B) genetic drift
C) founder effect
D) population bottleneck
E) selection
D) population bottleneck
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The use of a double genus in a microorganism's label, such as Burkholderia (Pseudomonas), indicates that the bacterium:
a. does not fit well in either group but has some characteristics of both groups. b. is a genetic cross between the two groups. c. has been moved from one genus (Pseu-domonas) to another genus (Burkholde-ria). d. has been moved from one genus (Burk-holderia) to another genus (Pseudomo-nas).
A filamentous organelle comprised of tubulins with a diameter of 25 nm is called
A. mycelia. B. microtubule. C. intermediate filament. D. microfilament.
Which sentence best describes the process of competitive inhibition?
a. The inhibitor binds to and directly blocks the active site of the enzyme. b. The products of the reaction block the active site of the enzyme. c. The substrate and cofactors compete for the active site. d. The inhibitor binds to a site other than the active site of the enzyme and blocks enzyme activity indirectly.
Which of the following statements correctly describes any chemical reaction that has reached equilibrium?
A) The concentrations of products and reactants are equal. B) The reaction is now irreversible. C) Both forward and reverse reactions have halted. D) The rates of the forward and reverse reactions are equal.