Oligomycin is an antibiotic that binds ATP synthase, blocking the flow of protons through the enzyme's proton channel. In addition to preventing synthesis of ATP, what additional effect might you expect in response to the presence of oligomycin?
A. higher pH in the intermembrane space
B. lower pH in the intermembrane space
C. a buildup of protons in the mitochondrial
matrix
B
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Hardy-Weinberg pointed out that the original proportions of the genotypes in a population would remain constant from generation to generation if certain assumptions are met. Which one of the following is not a Hardy-Weinberg condition?
A. No gene flow occurs. B. Random mating occurs. C. No polymorphic loci exist in the population. D. No selection occurs. E. The population is very large.
Animals that have the four basic characteristics of chordates plus a vertebral column are
a. invertebrates. b. hemichordates. c. cephalochordates. d. vertebrates.
In Figure 17-1, the purpose of electrical shock at the stage of the process labeled A is to:
a. kill the egg cell nucleus.
b. initiate fusion of the two cells.
c. stimulate cell division.
d. induce mutations.
e. initiate apoptosi
Which of the following best explains why bacteria have the greatest biomass of any other plant or animal on earth?
a. Bacteria are able to live essentially anywhere—soil, air, water, ice, etc. b. Some bacteria can make their own food. c. Some bacteria can survive and thrive with or without oxygen. d. There is one dominant species of bacteria that has a greater molecular weight than other bacteria, accounting for the high biomass. e. The first three choices are correct.