A common environmental organism that may even grow in certain chemical disinfectants is
A. Escherichia coli.
B. Streptococcus pneumoniae.
C. Pseudomonas aeruginosa.
D. enveloped virus.
C
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Tunicates have which of the following traits?
A. radial symmetry B. incomplete digestive tract C. asymmetry D. pharyngeal slits E. endothermic
Which of the following is NOT true concerning
plants? a. There are at least 295,000 kinds of existing plants. b. Plants affect the composition of the atmosphere. c. Flowering plants are the dominant group in most regions. d. The colonization of the land by plants made it possible for animals to live and evolve on land. e. Plants resupply atmospheric oxygen by splitting CO2 during photosynthesis.
The use of DNA information to direct the production of particular proteins is called
A. polymerization. B. transcription. C. replication. D. gene expression. E. translation.
Which of the following describes a major component of the Staphylococcus aureus cell wall. It binds to the 'Fe' moiety (stem of the Y-shaped antibody) o rIgG, exerting an antiopsonin (and therefore strongly antiphagocytic) effect?
A. capsule B. protein A C. cytolytic exotoxins D. superantigen exotoxins E. DNAse enzymes