Which metabolic strategy does NOT invoke the proton motive force for energy conservation?
A) aerobic catabolism
B) anaerobic
C) chemoorganotrophy
D) photoautrophy
Answer: B
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What will be an ideal response?
The role of the postsynaptic neuron in neural communication is to ____
a. release neurotransmitters b. use gated calcium channels c. contain synaptic vesicles d. block the action of neurotransmitters e. receive the signal from the presynaptic cell
Which of the following best reflects what we know about how the flu virus moves between species?
A) The flu virus in a pig is mutated and replicated in alternate arrangements so that humans who eat the pig products can be infected. B) A flu virus from a human epidemic or pandemic infects birds; the birds replicate the virus differently and then pass it back to humans. C) An influenza virus gains new sequences of DNA from another virus, such as a herpesvirus; this enables it to be transmitted to a human host. D) An animal such as a pig is infected with more than one virus, genetic recombination occurs, the new virus mutates, the virus is passed to a new species such as a bird, and the virus mutates again and can now be transmitted to humans.
Conjugation between a bacterium that lacks an F factor (F?) and a bacterium that has an F factor on its chromosome (F+) could produce which of the following results?
A) The F? bacterium ends up carrying one or more plasmids from the F+ bacterium; the F+ bacterium is unchanged. B) The F+ bacterium ends up with a recombinant chromosome that carries some genes from the F? bacterium, and the F? bacterium ends up with an unaltered chromosome. C) The F+ bacterium ends up with a recombinant chromosome that carries some genes from the F? bacterium, and the F? bacterium ends up with a chromosome that lacks those genes. D) The F? bacterium ends up with a recombinant chromosome that carries some genes from the F+ bacterium, and the F+ bacterium ends up with an unaltered chromosome.