________ was the first to isolate a root nodule bacterium capable of nitrogen fixation.
Fill in the blank(s) with the appropriate word(s).
Beijerinck
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The term that refers to those microbes found as symbionts in a short relationship of a nongrowing nature is ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following pertains to both tetanus and foodborne botulism?
A. They are caused by enterotoxins of the pathogen. B. They occur when endospore-contaminated soil enters deep wounds. C. Nausea and diarrhea are symptoms. D. An exotoxin blocks acetylcholine release. E. Treatment involves antitoxin therapy.
After 24 hours incubation of a facultative anaerobic bacterium in the 'Lysine Iron Agar', Yellow Butt can be interpreted as
A. The pH decreased B. The pH did not change during the incubation C. The pH is increased following an initial decrease D. The pH is decreased following an initial increase E. The pH change is irrelevant
The covalent linkage between the monomers in a dinucleotide is a(n) ________
A) disulfide bond B) ester bond C) peptide bond D) ionic bond E) phosphodiester bond