On the outer surface of the plasma membrane there are marker molecules that identify the cell type. Often these molecules are
A. ATP.
B. amino acids.
C. nucleotides.
D. carbohydrate chains.
E. inorganic ions.
D
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Methanogens are classified as ____
a. Crenarchaeota only b. Euryarchaeota only c. Korarchaeota d. Nanoarchaeota e. both Crenarchaeota and Euryarchaeota
Which is NOT a reason why microorganisms may have an inherent natural resistance to an antibiotic?
A) The organism may be able to pump out an antibiotic entering the cell. B) The organism may be impermeable to the antibiotic. C) The organism may be able to mutate the antibiotic target site to avoid antibiotic binding. D) The organism may be able to alter the antibiotic to an inactive form. E) None of the above.
B lymphocytes are associated with
A. allergic reactions. B. antibody production. C. antigen production. D. megakaryocyte breakdown. E. macrophage production.
The antibody found in breastmilk and coating mucous membranes is
A) IgA. B) IgD. C) IgE. D) IgG. E) IgM.