Which of the following may be used by prokaryotes, under anaerobic conditions, as terminal electron acceptors?

A. nitrate
B. nitrite
C. sulfate
D. carbon dioxide
E. All of the choices are correct.


E. All of the choices are correct.

Biology & Microbiology

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The effector molecule that binds to the activator of the lac operon is:

A. lactose. B. glucose. C. cAMP. D. allolactose.

Biology & Microbiology

One function of plants cells is to use light energy to make nutrients. Which structure enables plant cells to carry out this function?

A) cell wall B) nucleus C) chloroplasts D) cell membrane

Biology & Microbiology

If you found the same number of short tandem repeats at three different locations in two samples of DNA, what would you conclude?

A) Both samples were from females. B) Both samples were from males. C) The two samples were most likely from the same individual. D) The two samples were from different individuals.

Biology & Microbiology

Low-level disinfectants are sufficient to remove microbes from which of the following equipment tiers?

A) semicritical B) nonessential C) noncritical D) vital E) non-vital

Biology & Microbiology