Which metabolic strategy does NOT invoke the proton motive force for energy conservation?

A) aerobic catabolism
B) anaerobic
C) chemoorganotrophy
D) photoautrophy


Answer: B

Biology & Microbiology

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Compare mammal eyes specialized for daytime vision versus specialized for nighttime vision

What will be an ideal response?

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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

Biology & Microbiology

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.

Biology & Microbiology

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.

Biology & Microbiology