What is meant by the term cotransformation?
A) An F? cell can become F+ several times in a life cycle.
B) Cotransformation occurs when several linked genes are transformed simultaneously.
C) Several pieces of DNA can form heteroduplexes in a cell.
D) More than one phage infects a bacterial cell.
E) A cell can pick up more than one F factor.
Answer: B
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Which organism can cause granulomatous disease in animals and has been associated with soft-tissue infection in humans after animal bites?
a. S. paucimobilis b. Weeksella virosa c. Pasteurella multocida d. Actinobacillus spp.
Which structure do prokaryotic cells lack?
a. nucleoid regions b. membrane-bound nuclei c. cytoplasm d. a plasma membrane e. DNA
An organism that can use gaseous oxygen in metabolism and has the enzymes to process toxic oxygen products is a(n) ________.
A. aerobe B. obligate anaerobe C. facultative anaerobe D. microaerophile
Serovars are strains of a species that have distinctive antigenic properties.
Answer the following statement true (T) or false (F)