Abscesses and boils are often associated with ________.
A. Lactococcus lactis
B. Streptococcus mutans
C. Staphylococcus aureus
D. Streptococcus pneumoniae
Answer: C
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What causes rejection by the body's immune system after a transplant of an improperly matched organ?
I) non-self proteins in the tissue II) the presence of foreign major histocompatibility complex (MHC) proteins on the donor tissue III) antibodies and cytotoxic T lymphocytes (CTLs) responding to foreign tissue A) only I and III B) only II and III C) only I and IIII D) I, II, and III
Both gymnosperms and angiosperms form seeds, which can travel over long distances (either via wind or water). Which of the following are benefits of seed production and dispersal? Select all correct choices
A. Seeds can introduce offspring into environments with ample light. B. Seeds can introduce offspring into pathogen-free environments. C. Seeds can introduce offspring into nutrient -rich environments.
Covalent bonds
A. result from gaining electrons. B. are always nonpolar. C. result from sharing electrons. D. result from losing electrons. E. are always polar.
The binding of a positive allosteric regulator molecule will ________.
A. decrease the ability of the substrate to bind to the catalytic site B. increase the ability of the substrate to bind to the catalytic site C. increase the ability of the substrate to bind to the allosteric site D. decrease the ability of the substrate to bind to the allosteric site