Coliform bacteria are (Choose all that apply)
> Gram-negative rods
> Facultative anaerobes
> Non-endospore forming
> Lactose fermentors
> Produce acid and gas in 48h at 35C
> Gram-negative cocci
> Obligate anaerobes
> Endospore forming
> Gram-negative rods
> Facultative anaerobes
> Non-endospore forming
> Lactose fermentors
> Produce acid and gas in 48h at 35C
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You have discovered an enzyme that can catalyze two different chemical reactions. Which of the following is most likely to be correct?
A) The enzyme contains ?-helices and ?-pleated sheets. B) The enzyme is subject to competitive inhibition and allosteric regulation. C) Two types of allosteric regulation occur: The binding of one molecule activates the enzyme, while the binding of a different molecule inhibits it. D) Either the enzyme has two distinct active sites or the reactants involved in the two reactions are very similar in size and shape.
Which of the following is not true regarding the amphibian life cycle?
A. The adult life stage is carnivorous. B. The larval life stage is herbivorous. C. The larval life stage has lungs for breathing air. D. Reproduction must occur on land.
Which of the following may be associated with nosocomial disease?
A. Enterococcus species. B. Clostridium difficile. C. Pseudomonas species. D. Staphylococcus aureus. E. All of the choices are correct.
As a patch increases in size, the ratio of interior to edge increases
Indicate whether the statement is true or false