Porphyromonas gingivalis contributes to the development of
A) gastroenteritis.
B) typhoid fever.
C) periodontitis.
D) food poisoning.
E) hepatitis.
C
Bloom's Taxonomy: Knowledge
Section: Bacterial Diseases of the Digestive System
Learning Outcome: 23.5
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Why would co-administration of a bacteriostatic drug interfere with the effects of penicillin?
A. Since most bacteriostatic drugs are produced from bacteria, but penicillin is produced from mold, the two drugs are incompatible with each other. B. A bacteriostatic drug produces interference in the ability of a bacterial cell to take in compounds from the outside environment. Penicillin must be taken in by the cell in order to have its effect, so this would directly inhibit it. C. Penicillin interferes with cell wall production/stabilization by cross-linking of peptidoglycan. As such, it only works when the cells are actively replicating and MAKING new peptidoglycan. A bacteriostatic drug works by shutting down replication, holding the cells "static." This would interfere with the mode of action required by the penicillin. D. The bacteriostatic drugs would bind directly to the penicillin, preventing both its uptake by the cell and its ability to perform its duty within the bacterial cell.
Differences in patterns by which muscles connect to bones is relatively invariant in vertebrates
Indicate whether the statement is true or false.
B cells present antigens to helper T cells via __________________.
What will be an ideal response?
If pregnancy does occur, a layer of tissue from the embryo called the chorion begins to secrete which one of the following hormones?
A) GnRH B) estrogen C) FSH D) hCG E) LH