A throat swab from a patient with a sore throat has been plated onto blood agar. At what temperature should it be incubated?
a. 25oC
b. 30oC
c. 37oC
d. any of the above temperatures is appropriate
Ans: c. 37oC
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Protozoan cysts are
A. necessary for transmission to a new host. B. part of all protozoan life cycles. C. the primary form of replication. D. analogous to bacterial endospores. E. are produced by binary fission.
The development of multicellular organisms likely originated
a. from colonies of unicellular organisms of the same species. b. from endocytosis of other cells followed by mitosis. c. from cooperation between different species of cells. d. from colonies of numerous species of cells. e. from endosymbiotic eukaryotes.
Which of the following did Kornberg use to detect DNA synthesis?
A) Radioactively labeled E. coli cells B) Fluorescently labeled E. coli cells C) Radioactively labeled deoxynucleotide triphosphates D) Fluorescently labeled deoxynucleotide triphosphates E) Nonlabeled deoxynucleotide triphosphates
A plant lacking this macronutrient is likely to be deficient in which step of root nodule development?
A. phosphorus; development of infection threads B. phosphorus; curling of root hairs around rhizobia C. calcium; flavonoid release D. calcium; curling of root hairs around rhizobia