What is the primary determinant of virulence in Streptococcus pneumoniae?
A) the presence of a particular Lancefield antigen
B) the production of pneumolysin
C) the presence of a polysaccharide capsule
D) the ability to lyse red blood cells
E) strain-specific teichoic acids in its cell wall
C
Bloom's Taxonomy: Comprehension
Section: Bacterial Diseases of the Lower Respiratory System
Learning Outcome: 22.11
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Which is the proper order of organization?
a. Cells, organs, tissues b. Cells, tissues, organs c. Organs, tissues, organs systems d. Organs, cells, tissues e. Tissues, organs, cells.
Every tissue is defined by the type of
a. organ it is in. b. organ system it is a part of. c. organism that possesses it. d. cells that make it up. e. more than one of these
The alignment of homologous chromosomes with the exchange of genetic information between them is known as
A. random fertilization. B. lining up at the equator. C. independent assortment. D. crossing over.
The cellulase-excreting protist that can account for up to one-third of the biomass of a termite is a member of the genus ________.
A. Euglena B. Trichonympha C. Trichomonas D. Hexamida