Which of the following does NOT occur during the development of dental caries?
a. Streptococcus mutans uses dextran to attach to teeth and gums.
a. Oral microflora produce high concentrations of exoenzymes when sucrose is present.
b. Lactic acid dissolves calcium phosphate, causing decalcification of the tooth enamel.
c. Oral biofilm microflora produce high concentrations of organic acids.
Answer: A
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Which of the following represents the proper order of events in embryonic development?
A. fertilization, gastrulation, neurulation, cleavage, organogenesis B. fertilization, cleavage, gastrulation, organogenesis, neurulation C. fertilization, cleavage, gastrulation, neurulation, organogenesis D. fertilization, gastrulation, cleavage, neurulation, organogenesis E. fertilization, gastrulation, cleavage, organogenesis, neurulation
Replication of DNA occurs during ____
a. S phase b. G1 phase c. G0 phase d. prophase e. cytokinesis
Of the four types of T cells, only the ____________________ T cells destroy infected body cells. Fill in the blank(s) with the appropriate word(s)
The most common site where carriers of Staphylococcus aureus carry this pathogen is
A. all over the skin. B. under the fingernails. C. anterior nares (nostrils). D. mouth. E. intestines.