Where is ATP synthase located in non-photosynthetic eukaryotes?
a. outer membrane of the cell
b. nuclear envelope
c. rough endoplasmic reticulum
d. matrix of the mitochondria
e. inner mitochondrial membrane
E
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Viruses have all the following EXCEPT
a. are usually species-specific. b. may have multiple origins. c. are probably related to mobile genetic elements. d. may have escaped from cells. e. have mitochondria
What type of channel opens in response to changes in ionic charge across a membrane?
a. an electric-gated channel b. a charge-gated channel c. a ligand-gated channel d. a voltage-gated channel
A disaster such as a meltdown in a nuclear power plant requires close examination of potential impacts on organisms. Which of the following would be useful to biologists in such a situation?
A) Use a molecular clock to time the divergence of species in an area from those far away. B) Measure continental drift to determine if the disaster had accelerated movement of continents. C) Use radiometric dating to determine if new species are forming. D) Examine the mutation rate of species in the area.
Of these cellular targets of antimicrobials, drugs designed against which target are likely to have the least selective toxicity?
A. Nucleic acid synthesis B. Cell membrane C. Cell wall D. Ribosomes